TikZ to SVG

👤 khangvotranphuc 24/03/2026 00:34

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Code TikZ:

            \begin{tikzpicture}[scale=1, font=\footnotesize, line join=round, line cap=round, >=stealth, thick]
    
    % Định nghĩa màu sắc cho khay đá
    \colorlet{traylight}{teal!15}
    \colorlet{trayedge}{teal!40!gray}
    \colorlet{holebottom}{teal!60!black!50}
    \colorlet{holewall1}{teal!40!gray!60}
    \colorlet{holewall2}{teal!30!gray!40}

    % Vẽ thân khay (phần nền phía sau để tạo độ dày)
    \draw[fill=trayedge, rounded corners=10pt] (0,0) -- (9,0) -- (10.5, 3.5) -- (1.5, 3.5) -- cycle;
    
    % Vẽ mặt trên của khay
    \draw[fill=traylight, rounded corners=10pt] (0,0.3) -- (9,0.3) -- (10.5, 3.5) -- (1.5, 3.5) -- cycle;

    % Vẽ các ô chứa đá (3 hàng x 7 cột)
    \foreach \j in {0,1,2} {
        \foreach \i in {0,1,...,6} {
            \begin{scope}[shift={($(0.5, 0.6) + (\i*1.2 + \j*0.35, \j*0.9)$)}]
                % Tọa độ các đỉnh mặt trên của ô
                \coordinate (T1) at (0, 0);
                \coordinate (T2) at (1, 0);
                \coordinate (T3) at (1.3, 0.6);
                \coordinate (T4) at (0.3, 0.6);

                % Tọa độ các đỉnh mặt đáy của ô (tạo độ sâu)
                \coordinate (B1) at (0.15, 0.15);
                \coordinate (B2) at (0.85, 0.15);
                \coordinate (B3) at (1.05, 0.45);
                \coordinate (B4) at (0.35, 0.45);

                % Vẽ thành trong của ô đá
                \draw[fill=holewall1, draw=teal!50!black!30, thin] (T1) -- (T2) -- (B2) -- (B1) -- cycle;
                \draw[fill=holewall1!80!black, draw=teal!50!black!30, thin] (T1) -- (T4) -- (B4) -- (B1) -- cycle;
                \draw[fill=holewall2, draw=teal!50!black!30, thin] (T2) -- (T3) -- (B3) -- (B2) -- cycle;
                \draw[fill=holewall2!80!black, draw=teal!50!black!30, thin] (T3) -- (T4) -- (B4) -- (B3) -- cycle;

                % Vẽ đáy ô đá
                \draw[fill=holebottom, draw=teal!50!black!40, thin] (B1) -- (B2) -- (B3) -- (B4) -- cycle;
                
                % Vẽ viền miệng ô đá
     \draw[teal!40!black, thin] (T1) -- (T2) -- (T3) -- (T4) -- cycle;
            \end{scope}
        }
    }
\end{tikzpicture}
        

👤 khangvotranphuc 23/03/2026 22:50

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Code TikZ:

            \begin{tikzpicture}[scale=1, font=\footnotesize, line join=round, line cap=round, >=stealth, thick]
  % Định nghĩa các điểm cơ sở cho hình hộp
  % Đáy dưới
  \coordinate (A) at (0,0); % Góc trước
  \coordinate (B) at (4.5,0); % Góc phải dưới
  \coordinate (C) at (-2,1); % Góc trái dưới
  % Chiều cao thân hộp (không tính nắp)
  \def\hbody{2.2}
  \coordinate (A1) at ($(A)+(0,\hbody)$);
  \coordinate (B1) at ($(B)+(0,\hbody)$);
  \coordinate (C1) at ($(C)+(0,\hbody)$);
  \coordinate (D1) at ($(B1)+(C1)-(A1)$); % Góc sau
  
  % Chiều cao nắp
  \def\hlid{0.7}
  \coordinate (A2) at ($(A1)+(0,\hlid)$);
  \coordinate (B2) at ($(B1)+(0,\hlid)$);
  \coordinate (C2) at ($(C1)+(0,\hlid)$);
  \coordinate (D2) at ($(D1)+(0,\hlid)$);

  % Vẽ mặt trái của thân hộp (màu kem)
  \filldraw[fill=orange!5!white, draw=gray!50] (A) -- (C) -- (C1) -- (A1) -- cycle;
  
  % Vẽ mặt trước của thân hộp (màu kem)
  \filldraw[fill=orange!8!white, draw=gray!50] (A) -- (B) -- (B1) -- (A1) -- cycle;

  % Vẽ tay cầm trên mặt trái
  \draw[ultra thick, brown!40!black,] ($(C)!0.5!(A)+(-0.6,2)$) to[out=160, in=260] ($(C)!0.5!(A)+(0.3,1.7)$);

  % Vẽ nắp hộp
  % Mặt trước nắp
  \filldraw[fill=brown!70!black, draw=brown!80!black] (A1) -- (B1) -- (B2) -- (A2) -- cycle;
  % Mặt trái nắp
  \filldraw[fill=brown!80!black, draw=brown!90!black] (A1) -- (C1) -- (C2) -- (A2) -- cycle;
  % Mặt trên nắp
  \filldraw[fill=brown!60!black, draw=brown!70!black] (A2) -- (B2) -- (D2) -- (C2) -- cycle;

  % Vẽ các mũi tên kích thước và nhãn (màu xanh cyan)
  \begin{scope}
    % Chiều cao 30 cm
    \draw[<->] ($(C)+(-0.3,0)$) -- ($(C2)+(-0.3,0)$) node[midway, sloped, above] {$30$  cm};
    
    % Chiều rộng 50 cm
    \draw[<->] ($(A)+(0,-0.4)$) -- ($(B)+(0,-0.4)$) node[midway, below, sloped] {$50$ cm};
    % Chiều sâu 40 cm
    \draw[<->] ($(A)+(-0.2,-0.2)$) -- ($(C)+(-0.2,-0.2)$) node[midway, below, sloped] {$40$ cm};
  \end{scope}

\end{tikzpicture}
        

👤 khangvotranphuc 23/03/2026 22:24

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Code TikZ:

            \begin{tikzpicture}[scale=1, font=\footnotesize, line join=round, line cap=round, >=stealth, thick]
  % Định nghĩa màu sắc
  \colorlet{fabricLight}{violet!20}
  \colorlet{fabricMedium}{violet!35}
  \colorlet{fabricDark}{violet!50!gray!80}
  \colorlet{trimColor}{white!90!violet}

  % Tọa độ các đỉnh (B: Bottom, T: Top)
  \coordinate (Bfront) at (0,0);
  \coordinate (Bleft) at (-2.8, 1);
  \coordinate (Bright) at (2.8, 1);
  \coordinate (Bback) at (0, 2); % Điểm đáy phía sau (bên trong)

  \coordinate (Tfront) at (0,4);
  \coordinate (Tleft) at (-2.8, 5);
  \coordinate (Tright) at (2.8, 5);
  \coordinate (Tback) at (0, 6);

  % 1. Vẽ các mặt bên trong (đáy và 2 mặt sau)
  \fill[fabricDark] (Bleft) -- (Bfront) -- (Bright) -- (Bback) -- cycle;
  \fill[fabricDark!90!black] (Bleft) -- (Bback) -- (Tback) -- (Tleft) -- cycle;
  \fill[fabricDark!80!black] (Bright) -- (Bback) -- (Tback) -- (Tright) -- cycle;

  % 2. Vẽ mặt bên ngoài bên trái
  \fill[fabricLight] (Bleft) -- (Bfront) -- (Tfront) -- (Tleft) -- cycle;
  \draw[fabricMedium, thin] (Bleft) -- (Bfront) -- (Tfront) -- (Tleft) -- cycle;

  % 3. Vẽ mặt bên ngoài bên phải
  \fill[fabricMedium] (Bright) -- (Bfront) -- (Tfront) -- (Tright) -- cycle;
  \draw[fabricMedium!80!black, thin] (Bright) -- (Bfront) -- (Tfront) -- (Tright) -- cycle;

  % 4. Vẽ đường viền trắng (trim) ở các cạnh trên
  \draw[trimColor, line width=2.5pt] (Tleft) -- (Tfront) -- (Tright);
  \draw[trimColor, line width=1.5pt, opacity=0.8] (Tleft) -- (Tback) -- (Tright);
  \draw[trimColor, line width=1.5pt] (Tfront) -- (Bfront);
  \draw[trimColor, line width=1pt, opacity=0.6] (Tleft) -- (Bleft);
  \draw[trimColor, line width=1pt, opacity=0.6] (Tright) -- (Bright);

  % 5. Vẽ tay cầm (quai xách) ở mặt bên trái
  \coordinate (H1) at ($(Bleft)!0.5!(Tleft) + (0.5, 0.7)$);
  \coordinate (H2) at ($(Bfront)!0.5!(Tfront) + (-0.8, 1.2)$);
  \fill[fabricLight!80!black, opacity=0.5, draw=white] ($(H1)+(0,0.2)$) -- ($(H2)+(0,0.2)$) -- ($(H2)-(0,0.2)$) -- ($(H1)-(0,0.2)$) -- cycle;

  % 6. Vẽ đường chỉ khâu (seam) ở mặt bên phải
  \draw[fabricDark, thin, opacity=0.4] ($(Bfront)!0.6!(Bright)$) -- ($(Tfront)!0.6!(Tright)$);
\end{tikzpicture}
        

👤 votrongthaihoa 21/03/2026 12:15

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Code TikZ:

            \begin{tikzpicture}
    \tikzstyle{balloon}=[ball color=red];    
    \shade[balloon] ellipse (1.75 and 2);
    \shade[balloon] (-.1,-2) -- (-.3,-2.2) -- (.3,-2.2) -- (.1,-2) -- cycle;
    \draw (0,-2.2) -- (0,-5);
\end{tikzpicture}
\end{document}

        

👤 khangvotranphuc 21/03/2026 07:25

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Code TikZ:

            \begin{tikzpicture}[scale=0.7, font=\footnotesize, line join=round, line cap=round, >=stealth]
		% Vẽ mặt sân cỏ
		\fill[green!50!black!70] (-1, -1) rectangle (11,6.5);
		% Vẽ đường biên ngang (Baseline)
		\draw[white, ultra thick] (1,0) -- (9,0);
		% Vẽ phối cảnh sân bóng 
		\draw[white!80,ultra thick] (2,5) -- (-1,0);
		\draw[white!80,ultra thick] (8,5) -- (11,0);
		\draw[white!80,ultra thick] (2,5) -- (8,5);
		% Vẽ khu vực cấm địa (Penalty area)
		\draw[white!80, thick] (3,5) -- (2.5,3.5) -- (7.5,3.5) -- (7,5);
		
		% Vẽ cầu môn (Detailed Goal post)
		\begin{scope}[shift={(5,5)}, scale=0.7]
			% Định nghĩa các điểm góc của khung thành (để dễ quản lý)
			\coordinate (A) at (-2,0);   \coordinate (B) at (2,0);     % Chân cột trước
			\coordinate (C) at (2,1.5); \coordinate (D) at (-2,1.5);   % Góc trên trước
			\coordinate (E) at (-1.5,0.3); \coordinate (F) at (1.5,0.3); % Chân cột sau
			\coordinate (G) at (1.5,1.8); \coordinate (H) at (-1.5,1.8); % Góc trên sau	
			% Khung thành chính (Cột và xà ngang)
			\draw[white, ultra thick] (A) -- (D) -- (C) -- (B);
			% Lưới trên
			\draw[white!70, pattern=crosshatch, pattern color=white] (D) -- (H) -- (G) -- (C) -- cycle;
			% Lưới bên trái
			\draw[white!70, pattern=crosshatch, pattern color=white] (A) -- (D) -- (H) -- (E) -- cycle;
			% Lưới bên phải
			\draw[white!70, pattern=crosshatch, pattern color=white] (B) -- (C) -- (G) -- (F) -- cycle;
			% Vẽ khung sau
			\draw[white!70, pattern=crosshatch, pattern color=white] (E) -- (H) -- (G) -- (F);
		\end{scope}
		% Tọa độ các vị trí
		\coordinate (A) at (1,0);
		\coordinate (B) at (4,0);
		\coordinate (C) at (7,0);
		\coordinate (D) at (7.5,3); 
		% Vẽ ba cầu thủ áo đỏ 
		\foreach \p/\num in {A/4, B/2, C/3}{
			\begin{scope}[shift={(\p)}, scale=0.6]
				% Quần áo
				\fill[red!80!black] (-0.3,0.2) rectangle (0.3, 1.5); % Thân
				\node[white, scale=0.7] at (0, 0.8) {\textbf{\num}};
				\fill[red!70] (-0.5, 1.4) -- (-0.3, 1.5) -- (-0.3, 0.8) -- (-0.5, 0.7) -- cycle; % Tay trái
				\fill[red!70] (0.5, 1.4) -- (0.3, 1.5) -- (0.3, 0.8) -- (0.5, 0.7) -- cycle; % Tay phải
				% Đầu
				\fill[pink!80!brown] (0, 1.8) circle (0.3);
				\fill[black] (-0.3,2) arc (160:20:0.3) -- cycle; % Tóc
				% Chân
				\draw[red!80!black, line width=3pt] (-0.15, 0.2) -- (-0.15, -0.3);
				\draw[red!80!black, line width=3pt] (0.15, 0.2) -- (0.15, -0.3);
				\fill[white] (-0.3, -0.3) rectangle (-0.05, -0.45); % Giày
				\fill[white] (0.05, -0.3) rectangle (0.3, -0.45);
			\end{scope}
		}
		
		% Vẽ quả bóng (The ball)
		\fill[orange!30] (D) circle (0.2);
		\draw[black, thick] (D) circle (0.2);
		\foreach \ang in {0, 60, ..., 300} \draw[black, very thin] (D) -- ++(\ang:0.2);
		% Các đường hình học nối từ cầu thủ đến bóng
		\draw[white, thick] (A) -- (D);
		\draw[white, thick] (B) -- (D);
		\draw[white, thick] (C) -- (D);
		\foreach \x/\y in {A/225, B/270, C/270, D/0}{
			\fill[white] (\x) circle (1.5pt);
			\draw (\x) +(\y:0.5) node[white] {\textbf{\x}};
		}
	\end{tikzpicture}
        

👤 votrongthaihoa 18/03/2026 16:47

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Code TikZ:

            \begin{tikzpicture}
      \pgfmathsetmacro{\b}{75}
      \pgfmathsetmacro{\a}{15}
      \pgfmathsetmacro{\R}{2}
      \pgfmathsetmacro{\r}{1}
      \pgfmathsetmacro{\P}{\R*tan(\b)}
      \pgfmathsetmacro{\Q}{\R/cos(\b)}
      \pgfmathsetmacro{\p}{\r/tan(\a)}
      \pgfmathsetmacro{\q}{\r/sin(\a)}
      \draw (0,0) circle (\R) ;
      \fill[left color=gray!80, right color=gray!60, middle
        color=white] (0,0) circle (\R) ;
      \draw[thick, white] (0,0) circle (.8*\R);
      \shade[ball color=white] (0,0) circle (.3) node[left,xshift=-5] {$P$};
      \draw (\Q+\q-.3, 0) circle (\r);
      \fill[left color=gray!80, right color=gray!60, middle
        color=white] (\Q+\q-.3, 0) circle (\r) ;
      \draw[thick, white] (\Q+\q-.3,0) circle (.8*\r);
      \shade[ball color=white] (\Q+\q-.3,0) circle (.15) 
      node[right, xshift=2] {$Q$};
      \begin{scope}[ultra thick]
        \draw (\b:\R) arc (\b:360-\b:\R) ;
        \draw (\b:\R) -- ( \P, 0 ); 
        \draw (-\b:\R) -- ( \P, 0 );
        \draw (\Q-.3,0) -- + (\a:\p)  arc (105:-105:\r) ;
        \draw (\Q-.3,0) -- + (-\a:\p);
      \end{scope}
      \draw (0,0) -- (\b:\R) node[midway, above,sloped] {$R$} node[above] {$A$};
      \draw (-\b:\R)--(0,0) ;
      \draw (\Q+\q-.3,0) -- +(105:\r) node[midway,above, sloped] {$r$}
        node[above] {$E$};
      \draw (\Q+\q-.3,0) -- +(-105:\r) node[below] {$D$};
      \node[below] at (-\b:\R) {$B$};
      \node[below] at (\Q-.3,0) {$C$};
      \draw[dash pattern=on5pt off3pt] (0,0) -- (\Q+\q-.3,0);
      \node[fill=white] at (0.73*\Q, 0) {$\theta$} ;
      \draw (\Q-1.8,0) arc (180:195:1.5);
      \draw (\Q-1.8,0) arc (180:165:1.5);
\end{tikzpicture}
        

👤 hoang1101 18/03/2026 16:34

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Code TikZ:

            \begin{tikzpicture}
\tkzTabInit[lgt=2, espcl=3]
{$x$/1, $y'$/1, $y$/2}
{$-\infty$, $-1$, $2$, $5$, $+\infty$}

% dòng dấu y'
\tkzTabLine{,+,z,-,d,-,z,+,}

% dòng biến thiên y
\tkzTabVar{-/$-\infty$, +/$-4$, -D+/$-\infty$/$+\infty$, -/$8$, +/$+\infty$}
\end{tikzpicture}
        

👤 caothithanhtruc_885412 18/03/2026 09:00

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Code TikZ:

            \begin{tikzpicture}[scale=0.8]
\coordinate (O) at (0,0);
\coordinate (A) at (0,3);
\coordinate (B) at (-1.5,-1);
\coordinate (C) at (2,-0.5);

\draw (A) -- (O);
\draw (A) -- (B);
\draw (A) -- (C);
\draw (O) -- (B); % đã bỏ dashed
\draw (O) -- (C); % đã bỏ dashed

\draw (-2.5,-1.5) -- (2.5,-1.5) -- (4,1) -- (-1,1) -- cycle;

\node[below] at (O) {O};
\node[above] at (A) {A};
\node[left] at (B) {B};
\node[right] at (C) {C};

\node[left] at (-0.3, 2.2) {\tiny 13 m};
\node[right] at (0.4, 2.2) {\tiny 15 m};
\node[right] at (0, 0.7) {\tiny 12 m};
\node[below] at (-0.8, -0.6) {\tiny 5 m};
\node[below] at (1.1, -0.3) {\tiny 9 m};
\end{tikzpicture}
        

👤 Bot-Tikz-26 16/03/2026 14:12

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Code TikZ:

            \begin{tikzpicture}[line cap=round,line join=round,font=\footnotesize,>=stealth,scale=1.00]
			% Định nghĩa miền giá trị
			\def\xmin{-1.23}
			\def\xmax{3.23}
			\def\ymin{-3.0}
			\def\ymax{3.0}
			
			% Cắt vùng hiển thị cho đồ thị hàm số
			\begin{scope}
				\clip (\xmin,\ymin) rectangle (\xmax,\ymax);
				
				% Vẽ đồ thị hàm số
				\draw[smooth, samples=100, domain=\xmin:\xmax] plot (\x, {(\x)^3 - 3*(\x)^2 + 2});
				\draw[smooth, samples=100, domain=\xmin:\xmax] plot (\x, {-(\x)^2 + (\x)});
				\fill [pattern=north west lines,line width=2pt,draw=none]
				plot[domain=-1:2,samples=100] (\x,{(\x)^3-3*(\x)^2+2})
				--
				plot[domain=2:-1,samples=100] (\x,{-((\x)^2)+(\x)})
				--cycle;
			\end{scope}
			
			% Lưới tọa độ
			\draw[step=1cm,help lines,dashed,opacity=0.5] (\xmin,\ymin) grid (\xmax,\ymax);
			
			% Vẽ trục tọa độ (ngoài vùng cắt)
			% Trục hoành Ox
			\draw[->] (\xmin,0)--(\xmax,0) node[above] {$x$};
			% Trục tung Oy
			\draw[->] (0,\ymin)--(0,\ymax) node[left] {$y$};
			% Gốc tọa độ O
			\fill (0,0) circle (1pt) node[below right] {$O$};
			
			% Giao điểm với các trục
			% Thêm nhãn: node[shift={(-120:2ex)}]{$A$}
			\fill (0,-2.00) node[shift={(-45:2ex)}]{$-2$} circle (1pt) node[]{};
			\fill (-1,0) circle (1pt) node[shift={(90:2ex)}]{$-1$};
			\fill (-1,-2) circle (1pt) node[]{};
			\fill (1.00,0) circle (1pt) node[shift={(60:2ex)}]{$1$};
			\fill (2.00,0) circle (1pt) node[shift={(60:2ex)}]{$2$};
			%\fill (-0.73,0) circle (1pt) node[]{};
			\fill (2.73,0) circle (1pt) node[]{};
			\fill (0.00,2.00) circle (1pt) node[]{};
			\fill (2.00,-2.00) circle (1pt) node[]{};
			\draw[dashed] (-1,0)|-(0,-2) (2,0)|-(0,-2);
	\end{tikzpicture}
        

👤 khangvotranphuc 15/03/2026 12:06

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Code TikZ:

            \begin{tikzpicture}[scale=1, font=\footnotesize, line join=round, line cap=round, >=stealth, thick]

% --- TỌA ĐỘ CÁC ĐIỂM CHÍNH ---
\coordinate (A) at (0,0);
\coordinate (B) at (3,0);
\coordinate (C) at (5.5,0);
\coordinate (D) at (7,3.5);

% --- VẼ NỀN VÀ CẢNH VẬT XUNG QUANH TRƯỜNG ---
\begin{scope}
	\begin{scope}[shift={(6,3.5)}, scale=0.8]
		% Vẽ thân cây (Trunk)
    \coordinate (BaseL) at (-0.25,0);
    \coordinate (BaseR) at (0.25,0);
    \coordinate (TopL) at (-0.1,1.5);
    \coordinate (TopR) at (0.1,1.5);
    
    \fill[orange!50!black] (BaseL) .. controls (-0.1,0.5) .. (TopL) -- (TopR) .. controls (0.1,0.5) .. (BaseR) -- cycle;

    % Vẽ các cành nhỏ (Branches)
    \draw[orange!50!black, line width=1.5pt] (0,1.2) -- (-0.4,1.8);
    \draw[orange!50!black, line width=1.5pt] (0,1.3) -- (0.4,1.7);

    % Vẽ tán lá đơn giản bằng các hình tròn chồng lấp (Canopy)
    \begin{scope}[shift={(0,2.3)}]
        % Tán lá chính
        \fill[green!60!black] (0,0.5) circle (0.7);
        \fill[green!60!black] (0.6,0.2) circle (0.6);
        \fill[green!60!black] (-0.6,0.2) circle (0.6);
        \fill[green!60!black] (0.5,-0.3) circle (0.6);
        \fill[green!60!black] (-0.5,-0.3) circle (0.6);
        \fill[green!60!black] (0,0) circle (0.8);
        
        % Điểm xuyết sáng (Highlights)
        \fill[green!80!black] (0.2,0.3) circle (0.3);
        \fill[green!80!black] (-0.3,0.1) circle (0.2);
    \end{scope}

    % Vẽ mặt đất (Ground)
    \draw[green!40!black] (-1.5,0) -- (1.5,0);
    \fill[green!40!black] (-0.5,0) arc (180:0:0.5 and 0.1) -- cycle;
    \end{scope} 
        
    % Vẽ ngôi trường tại D
    \begin{scope}[shift={(D)}, scale=0.6]
        % Tường trường
        \draw[fill=red!30] (-2,0) rectangle (1.5,1.5);
        \draw[fill=red!30] (1.5,0) -- (2.5,0.5) -- (2.5,1.8) -- (1.5,1.5) -- cycle;
        % Mái trường
        \draw[fill=red!70] (-2.2,1.5) -- (0,2.5) -- (1.7,1.5) -- cycle;
        \draw[fill=red!80] (1.7,1.5) -- (0,2.5) -- (1.2,3) -- (2.7,1.8) -- cycle;
        % Cửa sổ và cửa chính
        \draw[fill=yellow!20] (-1.5,0.4) rectangle (-0.7,1);
        \draw[fill=yellow!20] (-0.3,0.4) rectangle (0.5,1);
        \draw[fill=brown!60] (0.8,0) rectangle (1.3,1.1);      
        % Vẽ cột cờ và lá cờ Việt Nam
\coordinate (Pole) at ($(D)+(1.8,0.2)$);
\draw[line width=1.5pt, gray!80] (Pole) -- ($(Pole)+(0,3.5)$);
\begin{scope}[shift={($(Pole)+(0,3.5)$)}]
    % Lá cờ đỏ
    \fill[red] (0,0) rectangle (1.2,-0.8);
    \draw[red] (0,0) rectangle (1.2,-0.8);
    % Ngôi sao vàng ở giữa
    \begin{scope}[shift={(0.6,-0.4)}, scale=0.15, rotate=18]
        \fill[yellow] (90:1) -- (162:0.4) -- (234:1) -- (306:0.4) -- (18:1) -- (90:0.4) -- (162:1) -- (234:0.4) -- (306:1) -- (18:0.4) -- cycle;
    \end{scope}
\end{scope}    
    \end{scope}
\end{scope}

% --- VẼ CÁC ĐƯỜNG DẪN ĐẾN ĐIỂM D ---
\draw (A) -- (D);
\draw (B) -- (D);
\draw (C) -- (D);
\draw (A) -- (C);

% --- VẼ CÁC HỌC SINH TẠI A, B, C (HƯỚNG VỀ D) ---
\tikzset{
  hocsinh/.pic={
    % Chân
    \fill [brown!80!black] (-0.15,0) ellipse (0.1 and 0.05);
    \fill [brown!80!black] (0.15,0) ellipse (0.1 and 0.05);
    \draw[fill=blue!70!black] (-0.2,0.1) rectangle (-0.05,0.8);
    \draw[fill=blue!70!black] (0.05,0.1) rectangle (0.2,0.8);
    % Thân/Áo
    \draw[fill=white] (-0.25,0.8) -- (0.25,0.8) -- (0.2,1.6) -- (-0.2,1.6) -- cycle;
    % Balo
    \draw[fill=#1] (-0.2,0.9) rectangle (0.2,1.5);
    % Đầu
    \draw[fill=pink!80!white] (0,1.8) circle (0.25);
    % Tóc/Mũ
    \fill[black!80] (-0.25,1.9) arc (150:30:0.3) -- cycle;
  }
}

% Học sinh 1 (Bên trái, balo đỏ)
\begin{scope}[shift={(A)}, scale=1.1]
    \pic {hocsinh=red!80!black};
    % Tóc đuôi ngựa cho bạn nữ
    \fill[black!80] (-0.2,1.9) circle (0.1);
\end{scope}

% Học sinh 2 (Ở giữa, balo xanh dương, có mũ)
\begin{scope}[shift={(B)}, scale=0.9]
    \pic {hocsinh=cyan!70!black};
    \end{scope}

% Học sinh 3 (Bên phải, balo tím)
\begin{scope}[shift={(C)}, scale=0.9]
    \pic {hocsinh=purple!70!white};
    % Tóc hai bên
    \fill[black!80] (-0.25,1.8) circle (0.08);
    \fill[black!80] (0.25,1.8) circle (0.08);
\end{scope}

% --- GÁN NHÃN CÁC ĐIỂM ---
\foreach \p/\g in {A/-135, B/-90, C/-45, D/-30} {
    \fill (\p) circle (1.5pt);
    \draw ($(\p)+(\g:0.4)$) node {$\p$};
}

\end{tikzpicture}
        

👤 nguyentanquang0106 10/03/2026 19:12

1 1

0

Code TikZ:

            \begin{tikzpicture}[
    x=1.8cm, y=14cm, % Scale trục x và y để hình to, rõ nét
    declare function={
        % Định nghĩa hàm phân phối chuẩn (dùng \u và \s thay vì \mu và \sigma để tránh trùng lệnh LaTeX)
        gauss(\x,\u,\s)=1/(\s*sqrt(2*pi))*exp(-((\x-\u)^2)/(2*\s^2));
    },
    >={Stealth[scale=1.1]} % Kiểu mũi tên giống vẽ tay
]

% --- CÁC THAM SỐ ---
\def\muO{50}       % Trung bình H0
\def\muI{52}       % Trung bình H1
\def\mysigma{1.0}  % [ĐÃ SỬA] Đổi tên biến thành \mysigma để không ghi đè ký hiệu toán học \sigma
\def\crit{51.5}    % Miền bác bỏ (ngưỡng 51.5 - chính xác nằm ở 3/4 đoạn từ 50 đến 52)

% -------------------------------
% 1. VẼ CÁC VÙNG GẠCH CHÉO (TÔ MÀU DIỆN TÍCH)
% -------------------------------
% Vùng Sai lầm loại II (Màu đỏ, gạch ngang) - Tô DƯỚI H1 (đỏ), BÊN TRÁI 51.5
\fill[pattern=horizontal lines, pattern color=red!80!black]
    plot[domain=47.5:\crit, samples=100] (\x, {gauss(\x, \muI, \mysigma)}) -- (\crit, 0) -- (47.5, 0) -- cycle;

% Vùng Sai lầm loại I (Màu xanh, gạch chéo) - Tô DƯỚI H0 (xanh), BÊN PHẢI 51.5
\fill[pattern=north west lines, pattern color=blue!80!black]
    plot[domain=\crit:54.5, samples=100] (\x, {gauss(\x, \muO, \mysigma)}) -- (54.5, 0) -- (\crit, 0) -- cycle;

% -------------------------------
% 2. VẼ TRỤC VÀ ĐƯỜNG CONG PHÂN PHỐI CHUẨN
% -------------------------------
% Trục ngang base line
\draw (47,0) -- (55.5,0);

% Đường cong H0 (Màu xanh đen)
\draw[blue!70!black, thick] plot[domain=46.5:53.5, samples=100] (\x, {gauss(\x, \muO, \mysigma)});
\node[blue!70!black, left] at (48.8, {gauss(48.8, \muO, \mysigma) + 0.02}) {$H_0$};

% Đường cong H1 (Màu đỏ)
\draw[red!80!black, thick] plot[domain=48.5:55.5, samples=100] (\x, {gauss(\x, \muI, \mysigma)});
\node[red!80!black, right] at (53.2, {gauss(53.2, \muI, \mysigma) + 0.02}) {$H_1$};

% -------------------------------
% 3. CÁC ĐƯỜNG GIÓNG XUỐNG VÀ NHÃN TRỤC X
% -------------------------------
% Đường gióng mu = 50
\draw (50,0) -- (50, {gauss(50, \muO, \mysigma)});
\node[below, blue!70!black] at (50, 0) {$\mu=50$};

% Đường gióng ngưỡng 51.5
\draw[dashed, thick] (\crit, 0) -- (\crit , {gauss(\crit, \muI, \mysigma) + 0.05}); % Chiều cao kéo dài qua đường đỏ
\node[below, yshift=-3pt] at (\crit, 0) {$51.5$};

% Đường gióng mu = 52
\draw[red!80!black] (52,0) -- (52, {gauss(52, \muI, \mysigma)});
\node[below right, red!80!black] at (52, 0) {$\mu=52$};

% -------------------------------
% 4. GHI CHÚ VÀ MŨI TÊN (BÊN DƯỚI)
% -------------------------------
% Mũi tên đỏ chỉ vào vùng Sai lầm loại II
\draw[<-, red!80!black, thick] (51.2, 0.05) -- (49, -0.06) 
    node[below, align=right] {SL loại II = $\mathbb P(\bar{X} < 51.5 \mid \mu=52)$};

% Mũi tên xanh chỉ vào vùng Sai lầm loại I
\draw[<-, blue!70!black, thick] (51.8, 0.03) to[out=340, in=170] (52.6, -0.05) 
    node[below right] {SL loại I $= \mathbb P(\bar{X} > 51.5 \mid \mu=50)$};

% -------------------------------
% 5. PHẦN CHỮ TOÁN HỌC (TRÊN ĐỈNH)
% -------------------------------
% Ghi chú chữ ở trên đỉnh cong
% [ĐÃ SỬA] Ký hiệu \sigma sẽ được giữ nguyên do không còn bị trùng tên biến
\node[align=left, blue!70!black, font=\large] (xbar) at (53.5, 0.42) {$\bar{X} \sim N\left(\mu, \dfrac{\sigma^2}{n}\right)$};
\draw[->, blue!70!black, thick] (xbar.west) to[out=180, in=60] (50.5, 0.35);

\end{tikzpicture}
        

👤 votrongthaihoa 08/03/2026 14:04

0 0

0

Code TikZ:

            \begin{tikzpicture}[line join=round, line cap=round]
    \coordinate (A) at (0,0);
    \coordinate (B) at (5,0);
    \coordinate (D) at (-2,-1.8);
    \coordinate (C) at (3,-1.8);
    \coordinate (S) at (0.5, 3.8);
    \draw[thick, dashed] (S) -- (A);
    \draw[thick, dashed] (A) -- (B);
    \draw[thick, dashed] (A) -- (D);
    \draw[thick, dashed] (A) -- (C);
    \draw[thick] (S) -- (B);
    \draw[thick] (S) -- (C);
    \draw[thick] (S) -- (D);
    \draw[thick] (D) -- (C);
    \draw[thick] (C) -- (B);
    \tikzset{point/.style={circle, inner sep=0pt, minimum size=3.5pt, fill=cyan!40, draw=black}}
    
    \node[point] at (S) {}; \node[above] at (S) {$S$};
    \node[point] at (A) {}; \node[above right] at (A) {$A$};
    \node[point] at (B) {}; \node[right] at (B) {$B$};
    \node[point] at (C) {}; \node[right] at (C) {$C$};
    \node[point] at (D) {}; \node[left] at (D) {$D$};

\end{tikzpicture}
        

👤 nghiasun04 07/03/2026 12:26

0 0

0

Code TikZ:

            \begin{tikzpicture}[>=Stealth, scale=0.8]

    % Vẽ các đường cong y = 8 - 8/x^2 (giả định a=8, b=8 dựa trên tiệm cận và điểm đi qua)
    \draw[thick, domain=1:4, smooth, variable=\x] plot ({\x}, {8-8/(\x*\x)});
    \draw[thick, domain=-4:-1, smooth, variable=\x] plot ({\x}, {8-8/(\x*\x)});

    % Vẽ phần hình nón (tam giác tô đậm)
    % Giả sử t=2.5 làm ví dụ minh họa
    \fill[black!50] (1,0) -- (0,0) -- (0,4.16) -- (2.5,6.72) 
        plot[domain=2.5:1, samples=100] (\x, {8 - 8/(\x*\x)}) -- cycle;
        \fill[black!50] (-1,0) -- (0,0) -- (0,4.16) -- (-2.5,6.72) 
        plot[domain=-2.5:-1, samples=100] (\x, {8 - 8/(\x*\x)}) -- cycle;
    \fill[gray!20] (0,4.16) -- (-2.5, 6.72) -- (2.5, 6.72) -- cycle;
    \draw[thick] (0,4.16) -- (-2.5, 6.72) -- (2.5, 6.72) -- cycle;

    % Các đường dóng và nhãn số liệu
    \draw[dashed] (-4.5, 7.5) -- (4, 7.5);
    \draw[dashed] (-4,-1.5) -- (-4, 7.5);
    \draw[dashed] (4,-1.5) -- (4, 7.5);
    \draw[dashed] (-1,0) -- (-1,-0.5);
    \draw[dashed] (1,0) -- (1,-0.5);
    \draw[<->] (-1,-0.5) -- (1,-0.5) node[midway, below] {$2m$};
    \draw[<->] (-4,-1.5) -- (4,-1.5) node[midway, below] {$8m$};
    \draw[<->] (-4.5,0) -- (-4.5,7.5) node[midway, left] {$7,5m$};

% Vẽ trục tọa độ
    \draw[->] (-5,0) -- (5,0) node[right] {$x(m)$};
    \draw[->] (0,0) -- (0,9) node[right] {$y(m)$};
    \node[white, above right] at (0,0) {$O$};

\end{tikzpicture}
        

👤 khangvotranphuc 06/03/2026 21:53

0 0

0

Code TikZ:

            \begin{tikzpicture}[scale=1, font=\footnotesize, line join=round, line cap=round, >=stealth, thick]
% ================= NHIỆT KẾ TRÁI (NÓNG) =================
\begin{scope}[shift={(0,0)}]
    \coordinate (L_Base) at (0,0);
    \coordinate (L_Icon) at (0,7);
    
    % Khung chính
    \draw[fill=white, line width=1.2pt] (L_Base) circle (0.6);
    \draw[fill=white, line width=1.2pt] (-0.25, 0.4) -- (-0.25, 5.8) arc (180:0:0.25) -- (0.25, 0.4);
    \fill[white] (-0.2, 0.4) rectangle (0.2, 0.65); % Ẩn phần gập lề/chồng lấp
    
    % Bên trong ống (Nền của cột thủy ngân)
    \fill[red!10] (-0.15, 0.5) rectangle (0.15, 5.6);
    
    % Chất lỏng (Đỏ) - Nhiệt độ cao ở ~100F
    \fill[red] (L_Base) circle (0.45);
    \fill[red] (-0.15, 0.4) rectangle (0.15, 4.0); 
    
    % Thang đo độ F (Trái)
    \node at (-0.7, 6.3) {$^\circ$F};
    \foreach \f in {0,20,40,60,80,100,120,140,160}{
        \pgfmathsetmacro{\ypos}{1.0 + (\f/160)*4.5}
        \draw (-0.25, \ypos) -- (-0.5, \ypos) node[left, scale=0.8] {\f};
        \ifnum \f < 160
            \foreach \i in {1,2,3,4} {
                \draw (-0.25, \ypos + \i*0.5625/5) -- (-0.35, \ypos + \i*0.5625/5);
            }
        \fi
    }
    
    % Thang đo độ C (Phải)
    \node at (0.7, 6.3) {$^\circ$C};
    \foreach \c in {-20,-10,0,10,20,30,40,50,60}{
        \pgfmathsetmacro{\fval}{1.8*\c + 32}
        \pgfmathsetmacro{\ypos}{1.0 + (\fval/160)*4.5}
        \draw (0.25, \ypos) -- (0.5, \ypos) node[right, scale=0.8] {\c};
        \ifnum \c < 60
            \foreach \i in {1,2,3,4,5,6,7,8,9} {
                \pgfmathsetmacro{\subf}{1.8*(\c + \i*1) + 32}
                \pgfmathsetmacro{\suby}{1.0 + (\subf/160)*4.5}
                \draw (0.25, \suby) -- (0.35, \suby);
            }
        \fi
    }
    
    % Biểu tượng Mặt trời
    \draw[fill=white, draw=gray!30] (L_Icon) circle (0.5);
    \fill[yellow, draw=orange] (L_Icon) circle (0.2);
    \foreach \ang in {0,45,...,315} {
        \draw[orange, line width=1pt] ($(L_Icon)+(\ang:0.25)$) -- ($(L_Icon)+(\ang:0.42)$);
    }
\end{scope}

% ================= NHIỆT KẾ PHẢI (LẠNH) =================
\begin{scope}[shift={(4,0)}]
    \coordinate (R_Base) at (0,0);
    \coordinate (R_Icon) at (0,7);
    
    % Khung chính
    \draw[fill=white, line width=1.2pt] (R_Base) circle (0.6);
    \draw[fill=white, line width=1.2pt] (-0.25, 0.4) -- (-0.25, 5.8) arc (180:0:0.25) -- (0.25, 0.4);
    \fill[white] (-0.2, 0.4) rectangle (0.2, 0.65); % Ẩn phần gập lề/chồng lấp
    
    % Bên trong ống
    \fill[cyan!10] (-0.15, 0.5) rectangle (0.15, 5.6);
    
    % Chất lỏng (Xanh) - Nhiệt độ thấp ở ~10F
    \fill[blue!80!cyan] (R_Base) circle (0.45);
    \fill[blue!80!cyan] (-0.15, 0.4) rectangle (0.15, 1.4); 
    
    % Thang đo độ F (Trái)
    \node at (-0.7, 6.3) {$^\circ$F};
    \foreach \f in {0,20,40,60,80,100,120,140,160}{
        \pgfmathsetmacro{\ypos}{1.0 + (\f/160)*4.5}
        \draw (-0.25, \ypos) -- (-0.5, \ypos) node[left, scale=0.8] {\f};
        \ifnum \f < 160
            \foreach \i in {1,2,3,4} {
                \draw (-0.25, \ypos + \i*0.5625/5) -- (-0.35, \ypos + \i*0.5625/5);
            }
        \fi
    }
    
    % Thang đo độ C (Phải)
    \node at (0.7, 6.3) {$^\circ$C};
    \foreach \c in {-20,-10,0,10,20,30,40,50,60}{
        \pgfmathsetmacro{\fval}{1.8*\c + 32}
        \pgfmathsetmacro{\ypos}{1.0 + (\fval/160)*4.5}
        \draw (0.25, \ypos) -- (0.5, \ypos) node[right, scale=0.8] {\c};
        \ifnum \c < 60
            \foreach \i in {1,2,3,4,5,6,7,8,9} {
                \pgfmathsetmacro{\subf}{1.8*(\c + \i*1) + 32}
                \pgfmathsetmacro{\suby}{1.0 + (\subf/160)*4.5}
                \draw (0.25, \suby) -- (0.35, \suby);
            }
        \fi
    }
    
    % Biểu tượng Bông tuyết
    \draw[fill=white, draw=gray!30] (R_Icon) circle (0.5);
    \foreach \ang in {0,60,...,300} {
        \draw[cyan, line width=1pt] (R_Icon) -- ($(R_Icon)+(\ang:0.35)$);
        \draw[cyan, line width=0.8pt] ($(R_Icon)+(\ang:0.2)$)+(\ang+45:0.1) -- ($(R_Icon)+(\ang:0.2)$) -- +(\ang-45:0.1);
    }
\end{scope}

\end{tikzpicture}
        

👤 khangvotranphuc 06/03/2026 08:21

0 0

0

Code TikZ:

            	\begin{tikzpicture}[scale=.8, font=\footnotesize, line join=round, line cap=round, >=stealth]
		\coordinate  (A) at (0,0);
		\coordinate  (B) at (-6,0);
		\draw(A) ellipse (1cm and 1.5cm);
		\draw ($(B)+(0,1.5)$) arc (90:270:1cm and 1.5cm);
		\draw[dashed] ($(B)-(0,1.5)$) arc (-90:90:1cm and 1.5cm);
		\coordinate  (C) at ($(A)+(90:1cm and 1.5cm)$);
		\coordinate  (C1) at ($(A)+(160:1cm and 1.5cm)$);
		\coordinate  (C2) at ($(A)+(-90:1cm and 1.5cm)$);
		\coordinate  (C3) at ($(A)+(45:1cm and 1.5cm)$);
		\coordinate (D) at ($(B)+(90:1cm and 1.5cm)$);
		\coordinate  (D1) at ($(B)+(160:1cm and 1.5cm)$);
		\coordinate (D2) at ($(B)+(-90:1cm and 1.5cm)$);
		\coordinate  (D3) at ($(B)+(45:1cm and 1.5cm)$);
		\coordinate (H) at (intersection of C--C2 and C1--C3);
		\draw (D)--(C)(D2)--(C2)--(C)
		(C1)--(C3) (D1)--(C1);
		\draw [dashed] (D3)--(C3) (D1)--(D3);
		\fill [cyan,opacity=0.45] (D3)--(D2)--(C2)--(C3);
		\fill [cyan,opacity=0.45 ] (D1)--(D2)--(D3);
		\fill [cyan,opacity=0.45] (D1) arc (160:270:1cm and 1.5cm);
		\fill [cyan,opacity=0.45 ] (C2) arc (-90:45:1cm and 1.5cm);
		\fill [cyan,opacity=0.15] (D1)--(C1)--(C3)--(D3)--cycle;
		\draw[thick,<->] (0,0)--(1,0) node[midway,sloped, above]{$1$ m};
		\draw[thick,<->] (-6,-2)--(0,-2) node[midway,below]{$5$ m};
		\draw[<-](0,1)--(1,1.5)node[right=-0.1]{$0{,}5$ m};
		%\foreach \x/\y in {A/90, B/180, C/0, D/0, C1/0, C2/0, C3/0, D1/0, D2/0, D3/0}{\fill (\x) circle(1pt) ($(\x)+(\y:0.3cm)$) node{$\x$};}
		
	\end{tikzpicture}
        

👤 Bot-Tikz-26 04/03/2026 14:52

0 0

0

Code TikZ:

            \begin{tikzpicture}[
    dot/.style={circle, fill=#1, inner sep=0pt, minimum size=6pt},
    level 1/.style={sibling distance=5.0cm, level distance=3.0cm},
    level 2/.style={sibling distance=2.5cm, level distance=3.0cm},
    edge from parent/.style={draw, thick, black, parent anchor=south, child anchor=north}
]
\node[dot=orange!80, label={[yshift=7pt]above:{$\text{Gốc } O$}}] {}
    child {
        node[dot=black, label={[xshift=-3pt]left:{$\text{Đ}$}}] {}
            child {
                node[dot=black, label={[yshift=-7pt]below:{$\text{Đ}$}}] {}
                edge from parent node[pos=0.5,sloped=false,anchor=east,xshift=0pt,yshift=0pt] {$\dfrac{4}{11}$}
            }
            child {
                node[dot=cyan!50, label={[yshift=-7pt]below:{$\text{X}$}}] {}
                edge from parent node[pos=0.5,sloped=false,anchor=west,xshift=0pt,yshift=0pt] {$\dfrac{7}{11}$}
            }
        edge from parent node[pos=0.5,sloped=false,anchor=east,xshift=0pt,yshift=0pt] {$\dfrac{5}{12}$}
    }
    child {
        node[dot=cyan!50, label={[xshift=2pt]right:{$\text{X}$}}] {}
            child {
                node[dot=black, label={[yshift=-7pt]below:{$\text{Đ}$}}] {}
                edge from parent node[pos=0.5,sloped=false,anchor=east,xshift=0pt,yshift=0pt] {$\dfrac{5}{11}$}
            }
            child {
                node[dot=cyan!50, label={[yshift=-7pt]below:{$\text{X}$}}] {}
                edge from parent node[pos=0.5,sloped=false,anchor=west,xshift=0pt,yshift=0pt] {$\dfrac{6}{11}$}
            }
        edge from parent node[pos=0.5,sloped=false,anchor=west,xshift=0pt,yshift=0pt] {$\dfrac{7}{12}$}
    };
\end{tikzpicture}
        

👤 Bot-Tikz-26 04/03/2026 14:46

0 0

0

Code TikZ:

            \begin{tikzpicture}[
    dot/.style={circle, fill=#1, inner sep=0pt, minimum size=6pt},
    grow=right,
    level 1/.style={sibling distance=5.0cm, level distance=3.0cm},
    level 2/.style={sibling distance=2.5cm, level distance=3.0cm},
    level 3/.style={sibling distance=1.3cm, level distance=3.0cm},
    edge from parent/.style={draw, thick, black, parent anchor=east, child anchor=west}
]
\node[dot=orange!80] {}
    child {
        node[fill=white,rectangle,inner sep=1pt,align=center] {nằm}
            child {
                node[fill=white,rectangle,inner sep=1pt,align=center] {khoang\\6 giường}
                    child {
                        node[fill=white,rectangle,inner sep=1pt,align=center] {tầng 3}
                    }
                    child {
                        node[fill=white,rectangle,inner sep=1pt,align=center] {tầng 2}
                    }
                    child {
                        node[fill=white,rectangle,inner sep=1pt,align=center] {tầng 1}
                    }
            }
            child {
                node[fill=white,rectangle,inner sep=1pt,align=center] {khoang\\4 giường}
                    child {
                        node[fill=white,rectangle,inner sep=1pt,align=center] {tầng 2}
                    }
                    child {
                        node[fill=white,rectangle,inner sep=1pt,align=center] {tầng 1}
                    }
            }
    }
    child {
        node[fill=white,rectangle,inner sep=1pt,align=center] {ngồi}
            child {
                node[fill=white,rectangle,inner sep=1pt,align=center] {mềm}
            }
            child {
                node[fill=white,rectangle,inner sep=1pt,align=center] {cứng}
            }
    };
\end{tikzpicture}
        

👤 khangvotranphuc 01/03/2026 12:37

0 0

0

Code TikZ:

            \begin{tikzpicture}[scale=1.5, line join=round, line cap=round, font=\footnotesize]
  % Định nghĩa màu sắc cho xúc xắc
  \colorlet{diceRed}{red!85!black}
  \colorlet{diceSide}{red!75!black}
  \colorlet{diceTop}{red!95!white}
  \colorlet{dotColor}{white}
  % Vẽ bóng đổ phía dưới các viên xúc xắc
  \fill[gray, opacity=0.3] (0.2,-1.4) ellipse (0.8 and 0.4);
  \fill[gray, opacity=0.2] (2.2,0.8) ellipse (1 and 0.5);

  % --- XÚC XẮC 1 (Dưới bên trái) ---
  \begin{scope}[shift={(0,0)}]
    % Định nghĩa các vector cơ sở cho phối cảnh giả 3D (isometric)
    \coordinate (O) at (0,0);
    \coordinate (X) at (0.8, 0.4);   % Hướng sang phải
    \coordinate (Y) at (-0.8, 0.4);  % Hướng sang trái
    \coordinate (Z) at (0, -1);      % Hướng xuống dưới

    % Tính toán các đỉnh dựa trên vector
    \coordinate (T) at ($(X)+(Y)$);  
    \coordinate (BL) at ($(Y)+(Z)$);
    \coordinate (BR) at ($(X)+(Z)$);

    % Vẽ các mặt
    % Mặt trên
    \fill[diceTop, rounded corners=2pt] (O) -- (X) -- (T) -- (Y) -- cycle;
    % Mặt trái
    \fill[diceRed, rounded corners=2pt] (O) -- (Y) -- (BL) -- (Z) -- cycle;
    % Mặt phải
    \fill[diceSide, rounded corners=2pt] (O) -- (X) -- (BR) -- (Z) -- cycle;

    % --- VẼ CÁC CHẤM (DOTS) ---
    % Mặt trên (Chấm 1) - Dùng hệ trục X và Y của mặt trên
    \begin{scope}[x={(X)}, y={(Y)}]
      \fill[dotColor] (0.5, 0.5) circle[radius=0.11];
    \end{scope}

    % Mặt trái (Chấm 5) - Dùng hệ trục Y và Z của mặt trái
    \begin{scope}[x={(Y)}, y={(Z)}]
      \fill[dotColor] (0.5, 0.5) circle[radius=0.1];
      \fill[dotColor] (0.25, 0.25) circle[radius=0.1];
      \fill[dotColor] (0.75, 0.75) circle[radius=0.1];
      \fill[dotColor] (0.25, 0.75) circle[radius=0.1];
      \fill[dotColor] (0.75, 0.25) circle[radius=0.1];
    \end{scope}

    % Mặt phải (Chấm 2) - Dùng hệ trục X và Z của mặt phải
    \begin{scope}[x={(X)}, y={(Z)}]
      \fill[dotColor] (0.3, 0.3) circle[radius=0.1];
      \fill[dotColor] (0.7, 0.7) circle[radius=0.1];
    \end{scope}
  \end{scope}

  % --- XÚC XẮC 2 (Trên bên phải) ---
  \begin{scope}[shift={(2,1.8)}, rotate=-15]
    % Định nghĩa vector tương tự xúc xắc 1
    \coordinate (O2) at (0,0);
    \coordinate (X2) at (0.8, 0.4);
    \coordinate (Y2) at (-0.8, 0.4);
    \coordinate (Z2) at (0, -1);

    \coordinate (T2) at ($(X2)+(Y2)$);
    \coordinate (BL2) at ($(Y2)+(Z2)$);
    \coordinate (BR2) at ($(X2)+(Z2)$);

    % Vẽ các mặt
    \fill[diceTop, rounded corners=2pt] (O2) -- (X2) -- (T2) -- (Y2) -- cycle;
    \fill[diceRed, rounded corners=2pt] (O2) -- (Y2) -- (BL2) -- (Z2) -- cycle;
    \fill[diceSide, rounded corners=2pt] (O2) -- (X2) -- (BR2) -- (Z2) -- cycle;
    % --- VẼ CÁC CHẤM (DOTS) ---
    % Mặt trên (Chấm 6)
    \begin{scope}[x={(X2)}, y={(Y2)}]
      \foreach \x in {0.3, 0.7} {
        \foreach \y in {0.2, 0.5, 0.8} {
          \fill[dotColor] (\x, \y) circle[radius=0.1];
        }
      }
    \end{scope}

    % Mặt trái (Chấm 2)
    \begin{scope}[x={(Y2)}, y={(Z2)}]
      \fill[dotColor] (0.3, 0.3) circle[radius=0.1];
      \fill[dotColor] (0.7, 0.7) circle[radius=0.1];
    \end{scope}

    % Mặt phải (Chấm 3)
    \begin{scope}[x={(X2)}, y={(Z2)}]
      \fill[dotColor] (0.2, 0.2) circle[radius=0.1];
      \fill[dotColor] (0.5, 0.5) circle[radius=0.1];
      \fill[dotColor] (0.8, 0.8) circle[radius=0.1];
    \end{scope}
  \end{scope}

\end{tikzpicture}
        

👤 khangvotranphuc 26/02/2026 08:04

0 0

0

Code TikZ:

            \begin{tikzpicture}[scale=1, font=\footnotesize, line join=round, line cap=round, >=stealth, thick]
    % --- THÂN CHAI THUỐC (Bottle) ---
    % Đáy chai (hiệu ứng 3D)
    \fill[black!80!brown] (0,0.2) ellipse (0.9 and 0.15);
    % Thân chai
    \fill[black!70!brown] (-0.9,0.2) rectangle (0.9,2.3);
    % Vai chai
    \fill[black!75!brown] (0,2.3) ellipse (0.9 and 0.1);
    
    % --- NHÃN THUỐC (Label) ---
    \fill[blue!40!black] (-0.85,0.6) rectangle (0.85,1.9);
    % Các đường kẻ trắng trên nhãn
    \draw[white, line width=0.8pt] (-0.85,1.8) -- (0.85,1.8);
    \draw[white, line width=0.8pt] (-0.85,0.7) -- (0.85,0.7);
    % Chữ trên nhãn
    \node[white, align=left, font=\bfseries\tiny, inner sep=2pt] at (0,1.25) {THUỐC TRỊ\\CẢM CÚM};

    % --- CỔ VÀ NẮP CHAI (Neck & Cap) ---
    \fill[black!90!brown] (-0.4,2.3) rectangle (0.4,2.5);
    \fill[black!95] (-0.55,2.5) [rounded corners=1pt] rectangle (0.55,3.1);
    % Khía trên nắp chai
    \foreach \x in {-0.45,-0.35,...,0.45} {
        \draw[gray!50, thin] (\x,2.55) -- (\x,3.05);
    }
    % --- VIÊN THUỐC (Capsules) ---
    % Viên 1 (bên trái)
    \begin{scope}[shift={(-1.3,0.5)}, rotate=110]
        \draw[gray!30, thin, fill=magenta] (0,0.15) arc (180:360:0.15) -- (0.3,0.15) -- (0.3,0.45) -- (0,0.45) -- cycle;
        \draw[gray!30, thin, fill=white] (0,0.45) rectangle (0.3,0.75);
        \fill[white] (0.15,0.75) circle (0.15);
        \draw[gray!30, thin] (0.15,0.9) arc (90:0:0.15) (0,0.75) arc (180:90:0.15);
    \end{scope}
    
    % Viên 2 (bên phải)
    \begin{scope}[shift={(0.9,0.3)}, rotate=-30]
        \draw[gray!30, thin, fill=white] (0,0.15) arc (180:360:0.15) -- (0.3,0.15) -- (0.3,0.45) -- (0,0.45) -- cycle;
        \draw[gray!30, thin, fill=blue] (0,0.45) rectangle (0.3,0.75);
        \fill[blue] (0.15,0.75) circle (0.15);
        \draw[gray!30, thin] (0.15,0.9) arc (90:0:0.15) (0,0.75) arc (180:90:0.15);
    \end{scope}

    % Viên 3 (phía trước)
    \begin{scope}[shift={(-0.7,0.1)}, rotate=85]
        \draw[gray!30, thin, fill=white] (0,0.15) arc (180:360:0.15) -- (0.3,0.15) -- (0.3,0.45) -- (0,0.45) -- cycle;
        \draw[gray!30, thin, fill=teal] (0,0.45) rectangle (0.3,0.75);
        \fill[teal] (0.15,0.75) circle (0.15);
        \draw[gray!30, thin] (0.15,0.9) arc (90:0:0.15) (0,0.75) arc (180:90:0.15);
    \end{scope}

    % --- KHUNG VĂN BẢN (Text Box) ---
    \node[draw=cyan, fill=orange!10, text width=5cm, inner sep=12pt, anchor=west, line width=1pt] (box) at (2.2,2.2) {
        Tỉ lệ người dùng khỏi bệnh sau ba ngày sử dụng thuốc đạt $95\%$.
    };
    % Hiệu ứng góc gấp (Folded corner)
    \fill[cyan] (box.south east) -- ++(-0.4,0) -- ++(0.4,0.4) -- cycle;
    \draw[cyan, line width=1pt] (box.south east) ++(-0.4,0) -- ++(0.4,0.4);

    % --- CHÚ THÍCH (Caption) ---
    \node[below] at (0,0) {\bf{Hình 5.3}};
\end{tikzpicture}
        

👤 khangvotranphuc 25/02/2026 15:34

0 0

0

Code TikZ:

            \begin{tikzpicture}[scale=0.8, font=\footnotesize\sffamily\bfseries, line join=round, line cap=round, >=stealth]
    
    \def\bw{2.2} 
    \def\br{0.4} 
    \path[save path=\beaker] (-\bw, 6) -- (-\bw, \br) arc(180:270:\br) -- (\bw-\br, 0) arc(-90:0:\br) -- (\bw, 5.7) to[out=90,in=200] (\bw+0.5, 6.2);

    \begin{scope}
        \clip (-\bw, 6) -- (-\bw, \br) arc(180:270:\br) -- (\bw-\br, 0) arc(-90:0:\br) -- (\bw, 6) -- cycle;
      
        \fill[cyan!40, opacity=0.7] (-\bw-1, 0) rectangle (\bw+1, 3);
        
        
        \draw[cyan!60, fill=cyan!30, thick] (0, 3) ellipse ({\bw} and 0.15);
    \end{scope}

   
    \begin{scope}
        
        \def\rockshape{plot[smooth cycle, tension=0.7] coordinates {
            (-1.4,0.25) (-1.1,0.9) (-0.3,1.2) (0.5,1.1) (1.3,0.5) (1.0,0.15) (-0.5,0.1)
        }}
        \draw[thick, draw=cyan!60!blue, fill=cyan!50!blue!40] \rockshape;
       
        \clip \rockshape;
        \foreach \i in {1,...,50}{
            \fill[cyan!40!blue!80] (rand*1.5, 0.6+rand*0.6) circle (0.04);
        }
    \end{scope}

    \draw[ultra thick, cyan!15, opacity=0.5] [use path=\beaker];

    \draw[thick, cyan!40!gray] [use path=\beaker];
    
    \fill[white, opacity=0.3] (-\bw+0.3, \br) rectangle (-\bw+0.6, 5.5);

    \foreach \y/\lab in {1/100, 2/200, 3/300, 4/400, 5/500} {
    
        \draw[black!80, thick] (0.8, \y) -- (1.6, \y);

        \node[left, black!90] at (0.8, \y) {\lab};
   
        \ifnum\y<5
            \draw[black!80, thin] (1.2, \y+0.5) -- (1.6, \y+0.5);
        \fi
    }
\end{tikzpicture}
        

👤 dung2012004 25/02/2026 10:49

1 1

0

Code TikZ:

            \begin{tikzpicture}[scale=1,font=\footnotesize,line join=round, line cap=round, >=stealth]
	\definecolor{deepskyblue}{rgb}{0.0, 0.75, 1.0}
	\fill[top color=deepskyblue!60,middle color=white] (-0.5,0.3)--(6,1)--(6,4)--(-0.5,4)--cycle;
	\fill[opacity=0.8, bottom color= cyan!50!white, top color= cyan!20!white] (-0.5,-1)--(6,-1)-- (6,1)--(-0.5,0.3)--cycle;
	%% Dây văng
	\def \Va{(-0.09,0.56) .. controls +(70:0.3) and +(-100:0.2)..(0.07,1.65) .. controls +(-65:1.55) and +(-114:2.92) .. (2.67,3.25) .. controls +(-60:0.6) and +(140:0.93) .. (4.4,1.27)}
	\def \Vb{(0.28,1.62) .. controls +(-61.9:1.53) and +(-115.0:2.78) .. (3.08,3.25) .. controls +(-60.6:0.42) and +(149.8:0.93) .. (4.92,1.30)}
	%% Dây cáp sau 
	\fill[pattern={Lines[angle=90,distance=2.75pt]},
	  pattern color=brown!80] \Vb-- (6,1.35) .. controls +(-177.5:2.94) and +(15.7:1.52) .. (0.27,0.64) --cycle;
	\draw [brown!80!black, line width=1] \Vb;

	\tikzset{tru/.pic={ 
	%% Mối nối thanh trụ
	\fill[black!20!red] (2.73,3.31)	.. controls +(-20:0.1) and +(-160:0.1) .. (3.06,3.31)-- (3.06,3.14) .. controls +(160:0.1) and +(20:0.1) .. (2.73,3.14) -- cycle
	(2.73,2.82) .. controls +(-20:0.1) and +(-160:0.1) .. (3.06,2.83) -- (3.06,2.68) .. controls +(160:0.1) and +(20:0.1) .. (2.73,2.68) -- cycle
	(2.73,2.36)  .. controls +(-20:0.1) and +(-160:0.1) .. (3.06,2.36) -- (3.06,2.19) .. controls +(160:0.1) and +(20:0.1) .. (2.73,2.19) -- cycle
	(2.73,1.77) .. controls +(-20:0.1) and +(-160:0.1) .. (3.06,1.76) -- (3.06,1.55) .. controls +(160:0.1) and +(20:0.1) .. (2.73,1.56) -- cycle;
	\fill[brown!40!red] (3.06,0.25) -- (3.17,0.25) -- (3.14,3.31) -- (3.06,3.31) -- cycle;
	}}
	%% Chân trụ
	\draw [line width=2, red!40!black] (2.81,0.93) -- (3.06,0.68) -- (2.75,0.30) -- (3.06,0.31) -- (2.75,0.67) -- (2.98,0.96)	
	(3.04,0.69) -- (2.75,0.68);
	\draw [line width=1, red!40!black] (0.13,0.49) -- (0.25,0.36) -- (0.1,0.17) -- (0.25,0.17) -- (0.1,0.36) -- (0.21,0.5)	(0.24,0.36) -- (0.1,0.36);
	\path 
	(0,0) pic[scale=1]{tru}
	(-1.28,0.02) pic[scale=0.5]{tru}
	(2.65,0.19) coordinate (O)
	(4.33,1.32) coordinate (A)
	(2.65,3.29) coordinate (D)
	(3.5,1.1) coordinate (M)
	(3.5,1.7) coordinate (N)
	;
	%% Bệ đỡ
	\fill[brown!80]  (4.45,0.56) .. controls +(90:0.35) and +(90:0.35) .. (4.95,0.58)-- (5.06,0.58) -- (5.06,1.11)--(4.35,1.06)-- (4.35,0.56) -- cycle;
	\fill[pattern=grid, pattern color=black!20!brown]  (4.45,0.56) .. controls +(90:0.35) and +(90:0.35) .. (4.95,0.58)-- (5.06,0.58) -- (5.06,1.11)--(4.35,1.06)-- (4.35,0.56) -- cycle;
	\fill[left color=gray,right color=white] (5.06,0.58) rectangle (5.11,1.37);
	%% Dầm cầu
	\fill[black!20!red] (-0.09,0.46) .. controls +(13.5:1.44) and +(-177.2:2.88) .. (6,1.16)--(6,1.35) .. controls +(-177.8:2.93) and +(16.1:1.52) .. (-0.09,0.55)--cycle;
	\draw (-0.09,0.46) .. controls +(13.5:1.44) and +(-177.2:2.88) .. (6,1.16);
	
	%% Dây cáp trước 
	\begin{scope}
	\clip \Va-- (6,1.35) .. controls +(-177.7:2.94) and +(15.6:1.68) .. (0.072,0.59) --cycle;
	\foreach \x in {0,1,...,50}
	\draw[brown!80] ({0.1*\x},0)--({0.1*\x},4);
	\end{scope}
	\draw [brown!80!black, line width=1] \Va;
	%% Thanh trụ trái
	\fill[brown!40!red] (O) -- (2.75,0.19) -- (2.73,3.31) -- (2.65,3.31) -- cycle
	(0.04,0.11) -- (0.1,0.11) -- (0.09,1.68) -- (0.06,1.68) -- cycle;
	\fill[left color=gray,right color=white] (4.3,0.55) rectangle (4.35,1.32);
	\draw[->,thick] (O)--+(10:1.5) node[below]{$x$};
	\draw[->,thick] (O)--+(-175:1.5) node[below]{$y$};
	\draw[->,thick] (O)--+(90:3.5) node[right]{$z$};
	\draw[thick,blue] (M)--(N);
	\foreach \i/\g in {A/170,D/180,O/-90,M/-90,N/90}
	\fill (\i) circle(1pt)+(\g:2.5mm)node{$\i$};
	\end{tikzpicture}
        

👤 khangvotranphuc 24/02/2026 09:29

0 0

0

Code TikZ:

            \begin{tikzpicture}[scale=1, font=\footnotesize, line join=round, line cap=round, >=stealth]
\coordinate (E) at (0,0);       
\coordinate (C) at (2.5,0);     
\coordinate (D) at (2.5,2);     
\coordinate (B) at (8,0);       
\coordinate (A) at (8,6.4);   
\draw[thick, brown!60!black] (-1,0) -- (9.5,0);
\draw[line width=2pt, blue!50!black] (E) -- (C);
\draw[line width=3pt, brown!80!black] (C) -- (D);
\draw[fill=black!80] ($(B)+(-0.4,0)$) to[out=90,in=270] ($(B)+(-0.15,0.3)$) -- ($(B)+(0.15,0.3)$) to[out=270,in=90] ($(B)+(0.4,0)$) -- cycle;
\draw[double, double distance=2pt, line width=1pt, black!90] ($(B)+(0,0.3)$) -- ($(A)-(0,0.7)$);

\draw[fill=black] ($(A)+(-0.2,-0.8)$) rectangle ($(A)+(0.2,-0.7)$);
\draw[fill=yellow!80!white, draw=black, thick] 
    ($(A)+(-0.4,-0.7)$) -- ($(A)+(0.4,-0.7)$) -- 
    ($(A)+(0.5,0.1)$) -- ($(A)+(-0.5,0.1)$) -- cycle;
\draw[fill=black!90] 
    ($(A)+(-0.6,0.1)$) -- ($(A)+(0.6,0.1)$) -- 
    ($(A)+(0.4,0.4)$) -- ($(A)+(0.15,0.5)$) -- 
    ($(A)+(0,0.8)$) -- 
    ($(A)+(-0.15,0.5)$) -- ($(A)+(-0.4,0.4)$) -- cycle;
\draw[thick, orange] (A) -- (E);
% 7. Gán nhãn điểm
\foreach \x/\y in {E/180, B/-90, C/-90}{
    \fill[cyan] (\x) circle(2pt);
    \node[below, blue!50!black, font=\bfseries] at (\x) {$\x$};
}
\foreach \x/\y in {A/-90, D/135}{
    \fill[cyan] (\x) circle(2pt);
    \node[left, blue!50!black, font=\bfseries, xshift=-2pt] at (\x) {$\x$};
}
% 8. Chú thích văn bản (Annotations)
\node[right, align=left] at ($(A)+(0.6,0)$) {đỉnh cột};
\node[right] at ($(B)+(0.6,0.2)$) {chân cột};
\node[right] at ($(B)+(-0.1,2.5)$) {cột đèn};
\node[right] at ($(C)+(0.1,0.5)$) {cọc gỗ};
\node[below, align=center] at ($(E)!0.5!(C)+(0,-0.2)$) {bóng\\cọc gỗ};
\node[above left, rotate=38] at ($(E)!0.5!(D)$) {tia sáng};
\end{tikzpicture}
        

👤 votrongthaihoa 13/02/2026 03:37

0 0

0

Code TikZ:

            \begin{tikzpicture}[scale=1, line join=round, line cap=round]
    \definecolor{stoneDark}{RGB}{100, 100, 100}
    \definecolor{stoneMid}{RGB}{160, 160, 160}
    \definecolor{stoneLight}{RGB}{210, 210, 210}
    \shadedraw[left color=stoneDark, right color=stoneMid, middle color=stoneLight] 
        (1.0,0) -- (3.0,0) -- (2.8,0.4) -- (1.2,0.4) -- cycle;
    \shadedraw[left color=stoneDark!120, right color=stoneMid!120, middle color=stoneLight!120]
        (1.3,0.4) rectangle (2.7,0.7);
    \shadedraw[left color=stoneDark, right color=stoneMid, middle color=stoneLight, draw=black!70]
        (1.5,0.7) -- (2.5,0.7) -- (2.4,6) -- (1.6,6) -- cycle;
    \foreach \x in {1.8, 2.0, 2.2} {
        \draw[black!40, line width=0.4pt] (\x, 0.8) -- (\x*0.8 + 0.4, 5.9);
    }
    \shadedraw[left color=stoneDark, right color=stoneMid, middle color=stoneLight]
        (1.55,6) -- (2.45,6) -- (2.7,6.3) -- (1.3,6.3) -- cycle;
    \shadedraw[left color=stoneDark!110, right color=stoneMid!110, middle color=stoneLight!110]
        (1.2,6.3) rectangle (2.8,6.6);
    \begin{scope}[black!50, opacity=0.4, very thin]
        \draw (1.7,3.0) -- (1.8,3.2) -- (1.75,3.4);
        
        \foreach \i in {1,...,20} {
            \fill (1.7 + 0.6*rnd, 0.8 + 5.0*rnd) circle (0.4pt);
        }
    \end{scope}

\end{tikzpicture}
        

👤 votrongthaihoa 12/02/2026 21:17

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Code TikZ:

            \begin{tikzpicture}[scale=1]

    \coordinate (D_prime) at (4.65, 1.95);
    \coordinate (C_prime) at (8.77, 1.95);
    \coordinate (B_prime) at (6.54, 0.6);
    \coordinate (A_prime) at (2.43, 0.6);
    \coordinate (D) at (4.65, 9.10);
    \coordinate (C) at (8.77, 9.10);
    \coordinate (B) at (6.54, 7.75);
    \coordinate (A) at (2.43, 7.75); 
    \fill[cyan!30] (A) -- (B) -- (B_prime) -- (A_prime) -- cycle;
    \fill[orange!30] (B) -- (C) -- (C_prime) -- (B_prime) -- cycle;
    \draw[thick, black] (A) -- (D) -- (C); 
    \draw[dashed, thick, black] (D) -- (D_prime);
    \draw[dashed, thick, black] (D_prime) -- (A_prime);
    \draw[dashed, thick, black] (D_prime) -- (C_prime);
    \draw[thick, black] (A) -- (B) -- (C);
    \draw[thick, black] (A) -- (A_prime);
    \draw[thick, black] (B) -- (B_prime);
    \draw[thick, black] (C) -- (C_prime);
    \draw[thick, black] (A_prime) -- (B_prime) -- (C_prime);
    \coordinate (P6) at (6.54, 1.75);
    \coordinate (P7) at (8.77, 3.9);
    \coordinate (P8) at (4.65, 5.0);
    \coordinate (P9) at (2.43, 4.75);
    \coordinate (P10) at (5.8, 5.55);
    \coordinate (P11) at (6.85, 7.07);
    \coordinate (P12) at (8.77, 8.25);
    \coordinate (P13) at (4.65, 8.55);
    \draw[thick, blue] (A_prime) -- (P6);    
    \draw[thick, blue] (P6) -- (P7);          
    \draw[thick, blue] (P9) -- (P10);           
    \draw[thick, blue] (P11) -- (P12);          

    \draw[dashed, thick, blue] (P7) -- (P8) -- (P9);
    \draw[dashed, thick, blue] (P12) -- (P13) -- (A); 

    \node[left] at (A) {$A$};
    \node[below left] at (B) {$B$};
    \node[right] at (C) {$C$};
    \node[above] at (D) {$D$};
    \node[left] at (A_prime) {$A'$};
    \node[below right] at (B_prime) {$B'$};
    \node[right] at (C_prime) {$C'$};
    \node[above left] at (D_prime) {$D'$};

    \node at (1.7, 4.175) {$100\,cm$}; 
    \node at (4.485, 0.3) {$20\,cm$}; 

\end{tikzpicture}
        

👤 votrongthaihoa 12/02/2026 21:14

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0

Code TikZ:

            \begin{tikzpicture}[>=Stealth, thick,scale=0.6]

    \definecolor{fillgray}{gray}{0.9}

    \fill[fillgray] plot[domain=-7:6, samples=100] (\x, {3 - (\x*\x)/12}) 
                 -- plot[domain=6:-7, samples=100] (\x, {5*(\x*\x)/36 - 5}) 
                 -- cycle;

    \draw (-7, -5) rectangle (6, 3);

    \draw[->] (-7.5, 0) -- (7.5, 0) node[below] {$x$};
    \draw[->] (0, -5.5) -- (0, 4) node[right] {$y$};
    \node[below left] at (0,0) {$O$};

    \draw[very thick] plot[domain=-7:6, samples=100] (\x, {3 - (\x*\x)/12});
    \draw[very thick] plot[domain=-7:6, samples=100] (\x, {5*(\x*\x)/36 - 5});
    \draw[very thick] (3.5, 2) to[bend right=45] (3.5, -3.3);
    \fill (4.5, 0.6) circle (4pt);
    \draw[<->] (6.5, 0) -- (6.5, 3) node[midway, right] {\textbf{3 cm}};
    \draw[<->] (6.5, 0) -- (6.5, -5) node[midway, right] {\textbf{5 cm}};
    \draw[<->] (-7, -5.5) -- (-6, -5.5) node[midway, below] {\textbf{1 cm}};
    \draw[<->] (-6, -5.5) -- (0, -5.5) node[midway, below] {\textbf{6 cm}};
    \draw[<->] (0, -5.5) -- (6, -5.5) node[midway, below] {\textbf{6 cm}};
    \draw[thin] (-7, -5) -- (-7, -5.7);
    \draw[thin] (-6, -5) -- (-6, -5.7);
    \draw[thin] (0, -5) -- (0, -5.7);
    \draw[thin] (6, -5) -- (6, -5.7);

\end{tikzpicture}
        

👤 votrongthaihoa 12/02/2026 21:11

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0

Code TikZ:

            \begin{tikzpicture}[line join=round, line cap=round, thick, scale=0.75]

\def\Rout{5}    % Bán kính ngũ giác ngoài
\def\Rin{1.2}    % Bán kính ngũ giác trong

\coordinate (R) at (126:\Rout);
\coordinate (M) at (54:\Rout);
\coordinate (N) at (-18:\Rout);
\coordinate (P) at (-90:\Rout);
\coordinate (Q) at (-162:\Rout);

\coordinate (D) at (90:\Rin);
\coordinate (C) at (18:\Rin);
\coordinate (B) at (-54:\Rin);
\coordinate (A) at (-126:\Rin);
\coordinate (E) at (162:\Rin);
\coordinate (O) at (0,0);

\coordinate (I) at ($(E)!0.5!(D)$);

\fill[orange!10] (M)--(C)--(N)--(B)--(P)--(A)--(Q)--(E)--(R)--(D)--cycle;

\draw[black!70, line width=1.2pt] (R)--(M)--(N)--(P)--(Q)--cycle;

\draw[brown!60!black, line width=1.5pt] (D)--(C)--(B)--(A)--(E)--cycle;

\draw[brown!60!black, line width=1.5pt] (R)--(D)--(M) (M)--(C)--(N) (N)--(B)--(P) (P)--(A)--(Q) (Q)--(E)--(R);

\draw[black!70, line width=1pt] (O) -- (R);

\foreach \p in {R,M,N,P,Q} {
    \filldraw[fill=blue!40, draw=blue!80!black] (\p) circle (2.5pt);
}
\foreach \p in {D,C,B,A,E,O,I} {
    \filldraw[fill=gray!80, draw=black] (\p) circle (2pt);
}

\node[above right, blue!70!black] at (M) {M};
\node[above left, blue!70!black] at (R) {R};
\node[right, blue!70!black] at (N) {N};
\node[below, blue!70!black] at (P) {P};
\node[left, blue!70!black] at (Q) {Q};

\node[above, black!70] at (D) {D};
\node[right, black!70] at (C) {C};
\node[below right, black!70] at (B) {B};
\node[below left, black!70] at (A) {A};
\node[left=4pt, black!70] at (E) {E};

\node[below right, black!80] at (O) {O};
\node[below, black!80] at (I) {I};

\end{tikzpicture}
        

👤 glutamicacid147 11/02/2026 13:36

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0

Code TikZ:

            \begin{tikzpicture}[scale = 0.8, line cap = round, line join = round, font = \footnotesize, thick]
    \coordinate (A) at (-1.5,-0.5);
    \coordinate (B) at (-0.5,-1.5);
    \coordinate (C) at (2,-1.5);
    \coordinate (D) at ($(A)-(B)+(C)$);
    \draw[thick,dashed] (A) -- (D) -- (C) -- (A) (D) -- (B);
    \draw[thick] (A) -- (B) -- (C);
    \def\h{8}
    \coordinate (Ap) at ($(A) + (0,\h)$);
    \coordinate (Bp) at ($(B) + (0,\h)$);
    \coordinate (Cp) at ($(C) + (0,\h)$);
    \coordinate (Dp) at ($(D) + (0,\h)$);
    \draw[thick] (Ap) -- (Dp) -- (Cp) -- (Ap) (Dp) -- (Bp);
    \draw[thick] (Ap) -- (Bp) -- (Cp);

    \coordinate (H) at (intersection of A--C and B--D);
    \coordinate (Hp) at (intersection of Ap--Cp and Bp--Dp);
    \draw[dashed] (H) -- (Hp);

    \coordinate (I) at (0.25,-9);
    \coordinate (Am) at ($(I)!1.5!(A)$);
    \coordinate (Bm) at ($(I)!1.5!(B)$);
    \coordinate (Cm) at ($(I)!1.5!(C)$);
    \coordinate (Dm) at ($(I)!1.5!(D)$);
    \draw[thick,dashed] (Am) -- (Dm) -- (Cm) -- (Am) (Dm) -- (Bm);
    \draw[thick] (Am) -- (Bm) -- (Cm);
    \draw[thick] plot [smooth, tension=0.7, samples=200] coordinates { (A) (Am) (Ap) };
    \draw[thick] plot [smooth, tension=0.7, samples=200] coordinates { (B) (Bm) (Bp) };
    \draw[thick] plot [smooth, tension=0.7, samples=200] coordinates { (C) (Cm) (Cp) };
    \draw[dashed,thick] plot [ smooth, tension=0.7, samples=200] coordinates { (D) (Dm) (Dp) };
    
    % --- Vẽ mặt gạch sọc ---
    \fill[pattern=north east lines, pattern color=gray!80] (Am) -- (Bm) -- (Cm) -- (Dm) -- cycle;
    
    % 1. Xác định tâm của mặt đáy (giao điểm 2 đường chéo)
    \coordinate (CenterLamp) at (intersection of Am--Cm and Bm--Dm);

    % 2. Vẽ bóng đèn tại vị trí tâm vừa tìm được
    % Dùng scope và shift để dịch chuyển cả cụm vẽ bóng đèn về đúng tâm
    \begin{scope}[shift={(CenterLamp)}, scale=0.5] % scale=0.8 để chỉnh kích thước đèn cho vừa vặn
        % a) Phần hào quang tỏa sáng (vẽ trước để nằm dưới)
        \fill[yellow, opacity=0.3] (0, 0.3) circle (2);
        
        % b) Phần bóng thủy tinh (dùng shade ball color để tạo khối tròn 3D)
        \shade[ball color=yellow!90!white] (0, 0.35) circle (0.5);
        % Viền nhẹ cho bóng
        \draw[orange!80!yellow, thin] (0, 0.35) circle (0.5);

        % c) Phần đui đèn kim loại
        \fill[gray!80!black] (-0.25, -0.1) rectangle (0.25, -0.4);
        % Các vạch ren trên đui đèn
        \draw[gray!40] (-0.25, -0.2) -- (0.25, -0.2);
        \draw[gray!40] (-0.25, -0.3) -- (0.25, -0.3);
        % Đầu tiếp xúc dưới cùng
        \fill[black] (0, -0.45) ellipse (0.1 and 0.05);
    \end{scope}
\end{tikzpicture}
        

👤 khangvotranphuc 07/02/2026 15:55

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Code TikZ:

            \begin{tikzpicture}[scale=1, font=\footnotesize, line join=round, line cap=round, >=stealth, thick]
\coordinate (A) at (0,0); % Góc dưới bên trái mặt trước
\coordinate (B) at (8,0.8); % Góc dưới bên phải mặt trước
\coordinate (C) at (7.3,5.2); % Góc trên bên phải mặt trước
\coordinate (D) at (-0.7,4.4); % Góc trên bên trái mặt trước
\coordinate (E) at (-1.8,0.5); % Góc dưới bên trái mặt sau

% Vẽ mặt bên (hình tam giác)
\fill[gray!80!blue!40] (A) -- (D) -- (E) -- cycle;
\draw[gray!60!black] (A) -- (D) -- (E) -- cycle;

% Vẽ khung mặt trước
\fill[gray!60!blue!30] (A) -- (B) -- (C) -- (D) -- cycle;
\draw[gray!60!black] (A) -- (B) -- (C) -- (D) -- cycle;

% Vẽ tờ lịch (bên trái mặt trước)
\coordinate (C1) at (0.2, 0.5);
\coordinate (C2) at (5.5, 1.0);
\coordinate (C3) at (5.1, 4.3);
\coordinate (C4) at (-0.2, 3.8);

\fill[white] (C1) -- (C2) -- (C3) -- (C4) -- cycle;
\draw[gray!40] (C1) -- (C2) -- (C3) -- (C4) -- cycle;

% Vẽ ảnh phía trên tờ lịch
\begin{scope}
    \clip (C1) -- (C2) -- (C3) -- (C4) -- cycle;
    \fill[orange!60!black] (-0.5, 3.0) -- (5.5, 3.5) -- (5.5, 4.5) -- (-0.5, 4.0) -- cycle;
    \node[white, font=\bfseries\large, rotate=5] at (4, 3.8) {2026};
\end{scope}

% Nội dung lịch (các chữ cái ngày trong tuần)
\begin{scope}[shift={(0.2,0.7)}, rotate=5]
    \node at (0.5, 2.2) {\tiny S};
    \node at (1.1, 2.2) {\tiny M};
    \node at (1.7, 2.2) {\tiny T};
    \node at (2.3, 2.2) {\tiny W};
    \node at (2.9, 2.2) {\tiny T};
    \node at (3.5, 2.2) {\tiny F};
    \node at (4.1, 2.2) {\tiny S};
    \draw[dotted] (0.2, 2.0) -- (4.4, 2.0);
    
    % Các con số mô phỏng
    \foreach \r in {0,1,2,3,4}{
        \foreach \c in {0,1,2,3,4,5,6}{
            \pgfmathsetmacro{\val}{int(\r*7 + \c - 3)}
            \ifnum\val>0
                \ifnum\val<32
                    \node at (0.5+0.6*\c, 1.6-0.4*\r) {\scalebox{0.7}{\val}};
                \fi
            \fi
        }
    }
\end{scope}

% Vẽ sổ ghi chú (bên phải mặt trước)
\coordinate (N1) at (6.0, 1.2);
\coordinate (N2) at (7.5, 1.4);
\coordinate (N3) at (7.2, 3.8);
\coordinate (N4) at (5.8, 3.6);

\fill[white] (N1) -- (N2) -- (N3) -- (N4) -- cycle;
\draw[gray!30] (N1) -- (N2) -- (N3) -- (N4) -- cycle;
\foreach \h in {1.6, 1.9, ..., 3.5}{
    \draw[gray!20] ($(N1)!\h/4!(N4)$) -- ($(N2)!\h/4!(N3)$);
}

% Vẽ lò xo (spiral binding)
\foreach \i in {0,1,...,24}{
    \draw[white!70, thick] ({-0.3+\i*0.3}, {4.1+\i*0.03}) .. controls +(-0.1, 0.3) and +(0.1, 0.3) .. ({-0.1+\i*0.3}, {4.2+\i*0.03});
}

% Thêm các chi tiết nhỏ/logo trên khung nhựa
\fill[white!90!gray, opacity=0.5] (6.0, 4.4) circle (0.1);
\fill[white!90!gray, opacity=0.5] (6.3, 4.5) circle (0.12);
\node[white, scale=0.5, rotate=5] at (6.5, 4.6) {\bf Thăng Long};

\end{tikzpicture}
        

👤 khangvotranphuc 07/02/2026 15:25

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Code TikZ:

            \begin{tikzpicture}[scale=0.8, font=\footnotesize, line join=round, line cap=round, >=stealth, thick]
			\coordinate (A) at (0,0);
			\coordinate (B) at (3,0);
			\coordinate (C) at (3.8,0.8);
			\coordinate (D) at (0.8,0.8); % Điểm khuất phía sau
			
			\coordinate (A1) at (0,6.1);
			\coordinate (B1) at (3,6.1);
			\coordinate (C1) at (3.8,6.9);
			\coordinate (D1) at (0.8,6.9);
			
			% Vẽ các đường nét đứt cho các cạnh khuất
			\draw[dashed, gray] (D) -- (A);
			\draw[dashed, gray] (D) -- (C);
			\draw[dashed, gray] (D) -- (D1);
			
			% Vẽ các mặt chính của thùng rác
			\draw[fill=gray!30] (A) -- (B) -- (C) -- (C1) -- (D1) -- (A1) -- cycle;
			\draw (B) -- (B1) -- (C1);
			\draw (B1) -- (A1);
			
			% Vẽ chi tiết phần nắp/gờ phía trên (inox bóng)
			\draw[fill=gray!10] (A1) -- (B1) -- (C1) -- (D1) -- cycle;
			\draw[thick] (A1) -- (B1) -- (C1) -- (D1) -- cycle;
			
			% Vẽ phần lưới gạt tàn phía trên (grid)
			\begin{scope}
				\coordinate (I1) at ($(A1)!0.15!(C1)$);
				\coordinate (I2) at ($(B1)!0.15!(D1)$);
				\coordinate (I3) at ($(C1)!0.15!(A1)$);
				\coordinate (I4) at ($(D1)!0.15!(B1)$);
				\clip (I1) -- (I2) -- (I3) -- (I4) -- cycle;
				\draw[fill=gray!20] (I1) -- (I2) -- (I3) -- (I4) -- cycle;
				\foreach \i in {0.1,0.2,...,0.9} {
					\draw[very thin, gray!60] ($(A1)!\i!(B1)$) -- ($(D1)!\i!(C1)$);
					\draw[very thin, gray!60] ($(A1)!\i!(D1)$) -- ($(B1)!\i!(C1)$);
				}
			\end{scope}
			\draw[thin] ($(A1)!0.15!(C1)$) -- ($(B1)!0.15!(D1)$) -- ($(C1)!0.15!(A1)$) -- ($(D1)!0.15!(B1)$) -- cycle;
			
			% Vẽ cửa bỏ rác ở mặt trước
			\draw[rounded corners=2pt, fill=gray!65] (0.4, 4.0) rectangle (2.6, 5.2);
			\draw[rounded corners=1pt, gray!50] (0.35, 3.95) rectangle (2.65, 5.25);
			
			% Ghi chú kích thước dọc theo các cạnh
			\path (A) -- (B) node[midway, below] {$30$ cm};
			\path (B) -- (C) node[midway, sloped, below] {$24$ cm};
			\path (A) -- (A1) node[midway,above,sloped] {$61$ cm};
	\end{tikzpicture}
        

👤 khangvotranphuc 07/02/2026 08:22

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Code TikZ:

            \begin{tikzpicture}[scale=1.2, font=\footnotesize, line join=round, line cap=round, >=stealth, thick]

  % Khai báo các bán kính
  \def\Rout{5.6}  % Bán kính ngoài cùng của thước
  \def\Rtick{4} % Bán kính bắt đầu các vạch chia
  \def\RnumO{4.9} % Bán kính đặt số đỏ (ngoài)
  \def\RnumI{4.15} % Bán kính đặt số đen (trong)

  % Vẽ khung hình bán nguyệt của thước đo độ
  \draw[fill=white] (0:\Rout) arc (0:180:\Rout) -- cycle;
  \draw (0:\Rtick) arc (0:180:\Rtick);

  % Vẽ các vạch chia độ
  \foreach \a in {0,1,...,180} {
    \draw (\a:5.3) -- (\a:\Rout); % Vạch 1 độ
  }
  \foreach \a in {0,5,...,180} {
    \draw (\a:5.1) -- (\a:\Rout); % Vạch 5 độ
  }
  \foreach \a in {0,10,...,180} {
    \draw (\a:5) -- (\a:\Rout); % Vạch 10 độ
    \draw[gray!70, line width=0.1pt] (0,0) -- (\a:\Rtick); 
    \node[red, font=\bfseries\small, rotate=\a-90] at (\a:\RnumO) {\a};

    % Ghi số màu Đen (tăng từ 0 đến 180 theo chiều ngược lại)
    \pgfmathsetmacro{\val}{int(180-\a)}
    \node[font=\bfseries\small, rotate=\a-90] at (\a:\RnumI) {\val};
  }

  % Vẽ trục số nằm ngang ở dưới
  \draw (-5.5,0) -- (6.5,0);
  \foreach \x in {-5,-4,-3,-2,-1,1,2,3,4,5} {
    \draw (\x,0) -- (\x,0.15);
    \node[below, font=\bfseries\normalsize] at (\x,0) {\x};
  }

  % Điểm gốc O và tia Oy, Ox
  \coordinate (O) at (0,0);
  \fill (O) circle (1.5pt) node[below=3pt, font=\bfseries\Large] {O};

  % Vẽ tia Oy (nằm trên trục Ox, hướng sang phải)
  \draw[blue, ultra thick] (O) -- (0:6.5) node[above right] {$y$};

  % Vẽ tia Ox (ở góc 120 độ)
  \draw[blue, ultra thick] (O) -- (120:6.2) node[above left] {$x$};
  % Vẽ cung tròn ký hiệu góc xOy
  \draw[blue, thick] (0:0.8) arc (0:120:0.8);

\end{tikzpicture}
        

👤 0023411302 05/02/2026 22:36

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Code TikZ:

            \begin{tikzpicture}
\tkzTabInit[lgt=2, espcl=3]
{$x$/1, $y'$/1, $y$/2}
{, $-1$, $0$, $1$, }

% dòng dấu y'
\tkzTabLine{,h,d,-,z,+,d,h}

% dòng biến thiên y
\tkzTabVar{-H/, +D+//$\sqrt2$, -/$0$, +D/$\sqrt2$/-H/$   $}
\end{tikzpicture}
        

👤 tvdaikg 31/01/2026 19:39

0 0

0

Code TikZ:

            \begin{tikzpicture}[
  scale=1.2,
  auto,
  node distance=4cm,
  thick,
  main/.style={circle, draw, fill=black, inner sep=2pt, outer sep=0pt},
  label_txt/.style={font=\bfseries\small}
]

  % Định nghĩa tọa độ 4 đỉnh
  \coordinate (A) at (0, 3);
  \coordinate (B) at (0, 0);
  \coordinate (C) at (5, 3);
  \coordinate (D) at (5, 0);

  % Vẽ các cạnh hình chữ nhật và đường chéo
  \draw (A) -- (C);
  \draw (A) -- (B);
  \draw (B) -- (D);
  \draw (C) -- (D);
  \draw (A) -- (D);
  \draw (B) -- (C);

  % Vẽ các đỉnh (chấm đen) và nhãn tên đỉnh (A, B, C, D)
  \node[main, label={[label distance=-1mm]180:$A$}] at (A) {};
  \node[main, label={[label distance=-1mm]180:$B$}] at (B) {};
  \node[main, label={[label distance=-1mm]0:$C$}]  at (C) {};
  \node[main, label={[label distance=-1mm]0:$D$}] at (D) {};

  % Thêm chú thích địa điểm (Thay thế cho hình ảnh bị lỗi)
  \node[label_txt, above, text=red!80!black] at (0, 3.2) {Nhà};
  \node[label_txt, below, text=blue!80!black] at (0, -0.2) {Văn phòng};
  \node[label_txt, above, text=orange!80!black] at (5, 3.2) {Cửa hàng};
  \node[label_txt, below, text=cyan!80!black] at (5, -0.2) {Bệnh viện};

  % Điền trọng số (không có dấu $)
  \path (A) -- node[above] {22} (C);
  \path (A) -- node[left] {14} (B);
  \path (B) -- node[below] {25} (D);
  \path (C) -- node[right] {18} (D);
  
  % Trọng số trên đường chéo (có nền trắng để không bị đường kẻ cắt ngang)
  \path (A) -- node[pos=0.3, fill=white, inner sep=1pt] {38} (D);
  \path (B) -- node[pos=0.3, fill=white, inner sep=1pt] {34} (C);

\end{tikzpicture}
        

👤 Bot-Tikz-26 27/01/2026 21:35

2 2

2

Code TikZ:

            \begin{tikzpicture}[
    % Tùy chỉnh kiểu cho các node (điểm tròn)
    dot/.style={circle, fill=#1, inner sep=0pt, minimum size=6pt},
    % Tùy chỉnh khoảng cách cây
    level 1/.style={sibling distance=5cm, level distance=3cm},
    level 2/.style={sibling distance=2.5cm, level distance=3cm},
    % Tùy chỉnh đường nối
    edge from parent/.style={draw, thick, black},
    % Tùy chỉnh nhãn trên đường nối
    edge label/.style={midway, fill=white, inner sep=1pt, font=\small}
]

% --- Gốc O (Màu cam) ---
\node[dot=orange!80, label=above:{\bfseries Gốc O}] {}
    % --- Nhánh trái (A) ---
    child {
        node[dot=cyan!50, label=left:{$A$}] {}
        child {
            node[dot=pink!90, label=below:{$B$}] {}
            edge from parent node[left=5pt] {0,3}
        }
        child {
            node[dot=violet!80, label=below:{$\overline{B}$}] {}
            edge from parent node[right=5pt] {0,7}
        }
        edge from parent node[left=5pt] {0,4}
    }
    % --- Nhánh phải (Not A) ---
    child {
        node[dot=green!60!black, label=right:{$\overline{A}$}] {}
        child {
            node[dot=pink!90, label=below:{$B$}] {}
            edge from parent node[left=5pt] {0,4}
        }
        child {
            node[dot=violet!80, label=below:{$\overline{B}$}] {}
            edge from parent node[right=5pt] {0,6}
        }
        edge from parent node[right=5pt] {0,6}
    };
\end{tikzpicture}
        

👤 toanhocdo 27/01/2026 16:51

0 0

0

Code TikZ:

            \begin{tikzpicture}[scale=0.8, font=\footnotesize, line join=round, line cap=round, >=stealth]
				\tkzDefPoints{0/0/A, 5/0/B, 2/-2/C}
				\tkzCentroid(A,B,C)\tkzGetPoint{H}
				\coordinate (A') at ($(H)+(0,6)$);
				\tkzDefPointsBy[translation=from A to A'](B,C){B'}{C'}
				\coordinate (M) at ($(B)!0.5!(C)$);
                \coordinate (N) at ($(A)!0.5!(C)$);
		\coordinate (E) at ($(A)!0.3!(C)$);	
        \coordinate (T) at ($(A')!0.8!(E)$);
\tkzMarkRightAngles(A',H,M B,A,C H,T,A' H,E,N)
				\tkzDrawPoints[fill=black](A,B,C,A',M,N,E,H,B',C')
				\tkzDrawSegments(A',B' B',C' C',A' A,C B,C A,A' B,B' C,C' A',E)
				\tkzDrawSegments[dashed](A,B A,M B,N A',H H,E H,T)
				\tkzLabelPoints[left](A,A',C',N,E,T)
				\tkzLabelPoints[below right](B')
				\tkzLabelPoints[below right](C,B,M)
				\tkzLabelPoints[below](H)
		\end{tikzpicture}
        

👤 Bot-Tikz-26 26/01/2026 08:46

0 0

0

Code TikZ:

            \tdplotsetmaincoords{70}{40}
	
	\begin{tikzpicture}[>=stealth, tdplot_main_coords] 
		% Vẽ hình tròn đáy trên mặt phẳng xy
		\draw[canvas is xy plane at z=0] (0,0) circle[radius=2cm];
		
		% Vẽ hệ trục tọa độ
		\draw[->] (-3,0,0)--(3,0,0)node[below]{$x$};
		\draw[->] (0,-3,0)--(0,3,0)node[right]{$y$};
		\draw[->] (0,0,-1)--(0,0,4)node[left]{$z$};
		
		% Vòng lặp vẽ các thiết diện tam giác
		\foreach \i in {-12,-11,...,12}{
			\pgfmathsetmacro\x{\i/6}
			\pgfmathsetmacro\y{sqrt(max(0, 4-(\x)^2))} % Dùng max(0,...) để tránh lỗi lấy căn số âm do sai số máy tính
			\pgfmathsetmacro\z{\y*sqrt(3)}
			\coordinate (A\i) at (\x,\y,0);
			\coordinate (B\i) at (\x,-\y,0);
			\coordinate (C\i) at (\x,0,\z);
			\draw[opacity=0.3, blue] (A\i)--(B\i)--(C\i)--cycle;
		}
		
		% Vẽ đường cong đỉnh
		\draw[thick, red] plot [smooth, tension=.8] coordinates{
			(C-12)(C-11)(C-10)(C-9)(C-8)(C-7)(C-6)(C-5)(C-4)(C-3)(C-2)(C-1)
			(C0)(C1)(C2)(C3)(C4)(C5)(C6)(C7)(C8)(C9)(C10)(C11)(C12)
		};
	\end{tikzpicture}
        

👤 khangvotranphuc 24/01/2026 14:05

0 0

0

Code TikZ:

            \begin{tikzpicture}[scale=0.8, font=\footnotesize, line join=round, line cap=round, >=stealth, thick]
	
	% --- VẼ CHÂN ĐẾ VÀ GIÁ ĐỠ VÒNG QUAY ---
	\fill[orange!80!black] (-1.5,-4.5) rectangle (1.5,-4.2);
	\fill[orange!80!black] (-1.3,-4.2) -- (-0.1,-1) -- (0.1,-1) -- (1.3,-4.2) -- cycle;
	\draw[orange!60!black] (-1.5,-4.5) rectangle (1.5,-4.2);
	
	% --- VẼ VÒNG QUAY ---
	\begin{scope}[shift={(0,0)}]
		% Vòng ngoài cùng (màu vàng có chấm sáng)
		\draw[orange, line width=8pt] (0,0) circle (3.2);
		\foreach \a in {0,20,...,340} {
			\fill[yellow] (\a:3.2) circle (0.1);
		}
		
		% Các phân đoạn màu và số
		\foreach \ang/\col/\val [count=\i] in {
			90/orange/2000, 
			60/purple!40/400, 
			30/magenta!60/300, 
			0/red!80/100, 
			-30/cyan!60/200, 
			-60/yellow!80/400, 
			-90/green!60/1000, 
			-120/violet!70/500, 
			-150/red!80/100, 
			-180/pink!80/300, 
			-210/cyan!60/200, 
			-240/green!80/1000
		} {
			\fill[\col] (0,0) -- (\ang:3) arc (\ang:\ang-30:3) -- cycle;
			\draw[white, thin] (0,0) -- (\ang:3);
			\node[rotate=\ang-15, white, font=\bfseries\small] at (\ang-15:2.2) {\val};
		}
		
		% Trục giữa
		\fill[yellow, draw=orange] (0,0) circle (0.4);
		\fill[white!90!yellow] (0,0) circle (0.2);
		
		% Kim chỉ (màu đỏ ở trên cùng)
		\fill[red] (-0.2, 3.4) -- (0.2, 3.4) -- (0, 2.8) -- cycle;
	\end{scope}
	
	% --- VẼ CÔ GÁI ---
	\begin{scope}[shift={(-5, -1)}]
		% Chân
		\fill[pink!30] (0.2,-2.5) rectangle (0.4,-3.2);
		\fill[pink!30] (0.7,-2.5) rectangle (0.9,-3.2);
		\fill[red, rounded corners=3pt] (0.1,-3.2) rectangle (0.45,-3.4); % Giày trái
		\fill[red,rounded corners=3pt] (0.65,-3.2) rectangle (1.0,-3.4); % Giày phải
		
		% Váy (màu xanh đậm)
		\fill[blue!40!black] (0,-1) -- (1.2,-1) -- (1.5,-2.5) -- (-0.3,-2.5) -- cycle;
		
		% Áo (màu trắng)
		\fill[white!90!gray] (0.1, 0.2) -- (1.1, 0.2) -- (1.2, -1) -- (0, -1) -- cycle;
		\draw[gray!30] (0.1, 0.2) -- (1.1, 0.2) -- (1.2, -1) -- (0, -1) -- cycle;
		
		% Khăn quàng đỏ
		\fill[red] (0.4, 0.1) -- (0.8, 0.1) -- (0.6, -0.4) -- cycle;
		\fill[red] (0.4, 0.2) -- (0.5, 0.5) -- (0.7, 0.5) -- (0.8, 0.2) -- cycle;
		
		% Cánh tay trái (giơ lên)
		\fill[pink!30] (0.1, -0.2) -- (-0.8, 0.8) -- (-0.6, 1.0) -- (0.2, 0.1) -- cycle;
		\fill[pink!30] (-0.7, 0.9) circle (0.15); % Bàn tay
		% Cánh tay phải (vỗ vào vòng quay)
		\fill[pink!30] (1.1, -0.2) -- (1.8, 0.3) -- (1.8, 0.5) -- (1.1, 0.1) -- cycle;
		\fill[pink!30] (1.8, 0.4) circle (0.15);
		
		% Đầu và mặt
		\fill[black] (0.6, 0.9) circle (0.54); % Mặt
		\fill[pink!30] (0.2, 0.8) arc (180:0:0.4 and 0.5) -- (1.1, 0.8) arc (0:-180:0.5) -- cycle; % Tóc
		\fill[black] (0.4, 0.8) circle (0.05); % Mắt trái
		\fill[black] (0.8, 0.8) circle (0.05); % Mắt phải
		\draw[red] (0.5, 0.6) arc (-150:-30:0.15); % Miệng cười
	\end{scope}
	
\end{tikzpicture}
        

👤 khangvotranphuc 24/01/2026 09:38

0 0

0

Code TikZ:

            \begin{tikzpicture}[scale=1, font=\footnotesize, line join=round, line cap=round, >=stealth, thick]

  % --- Tọa độ các điểm ---
  \coordinate (A) at (1, 1.8);
  \coordinate (B) at (2.8, 2.5);
  \coordinate (C) at (6, 0);
  \coordinate (D) at (7.5, -1.5);
  \coordinate (E) at (9.5, -1);

  % --- Vẽ vùng nước biển (Underwater) ---
  \fill[cyan!40] (-0.5,0) -- (11,0) -- (11,-3.5) 
    .. controls (10,-3) and (9,-4) .. (7.5,-3.2) 
    .. controls (6,-2.5) and (4.5,-4) .. (3,-3.2) 
    .. controls (1.5,-2.5) and (0.5,-4) .. (-0.5,-3.5) -- cycle;
  
  % --- Vẽ các bong bóng nước ---
  \foreach \p in {(6.2,-0.5), (6.5,-1), (6.8,-0.2), (7.8,-0.8), (8.2,-1.5), (9,-0.4), (9.8,-1.8), (10.2,-0.6)}{
    \draw[white, thin] \p circle (1.5pt);
  }
  \foreach \p in {(6.4,-0.7), (6.9,-1.2), (7.5,-0.5), (8.5,-1), (9.2,-2), (10,-1.2)}{
    \draw[white, thin] \p circle (0.8pt);
  }

  % --- Vẽ núi (Mountains) ---
  \fill[green!50!black!70] (0,0) -- (1,1.8) -- (2.2,0) -- cycle;
  \fill[green!60!black!60] (1,0) -- (2.8,2.5) -- (4.6,0) -- cycle;
  % --- Các đường dóng (Dashed lines) ---
  \draw[dashed] (A) -- (1,0);
  \draw[dashed] (B) -- (2.8,0);
  \draw[dashed, white] (7.5,0) -- (D);
  \draw[dashed, white] (9.5,0) -- (E);

  % --- Đường mực nước biển (Sea level) ---
  \draw[ultra thick] (-0.5,0) -- (11,0);

  % --- Vẽ con thuyền chi tiết tại C ---
  \begin{scope}[shift={(6,0.3)}, scale=0.8]
    \fill[red!80!black] (-1.2,0) -- (1.2,0) -- (1,-0.4) -- (-1,-0.4) -- cycle;
    \fill[white, draw=black, thin] (-0.8,0) rectangle (0.5,0.4);
    \fill[cyan!60] (-0.7,0.1) rectangle (-0.4,0.3);
    \fill[cyan!60] (-0.3,0.1) rectangle (0,0.3);
    \fill[cyan!60] (0.1,0.1) rectangle (0.4,0.3);
    \draw[line width=1.5pt, gray] (0.6,0) -- (0.6,0.8);
    \fill[gray!60] (0.5,0.4) -- (0.7,0.4) -- (0.6,0.6) -- cycle;
  \end{scope}

  % --- Vẽ con cá---
  \begin{scope}[shift={(D)}, scale=0.7,xscale=-1]
    \fill[orange!60, draw=orange!90] (0,0) ellipse (0.4 and 0.2);
    \fill[orange!60, draw=orange!90] (-0.35,0) -- (-0.6,0.15) -- (-0.6,-0.15) -- cycle;
    \fill[black] (0.2,0.05) circle (1.2pt);
    \draw[orange!90, thin] (-0.1,0.1) arc (120:60:0.2);
  \end{scope}

  % --- Vẽ thợ lặn chi tiết tại E ---
  \begin{scope}[shift={(E)}, scale=0.7, rotate=10, xscale=-1]
    \fill[black!85] (0,0) ellipse (0.5 and 0.2); % Thân
    \fill[black!85] (0.4,0.1) circle (0.15); % Đầu
    \fill[cyan!40] (0.45,0.1) circle (0.08); % Kính lặn
    \draw[yellow!80!orange, line width=3.5pt] (-0.1,0.15) -- (0.3,0.15); % Bình dưỡng khí
    \draw[black!85, line width=2.5pt] (-0.4,0) -- (-0.8,-0.2); % Chân
    \draw[black!85, line width=2.5pt] (-0.4,0) -- (-0.8,0.2); % Chân
    \draw[black!85, line width=2pt] (0.2,-0.1) -- (0.5,-0.3); % Tay
  \end{scope}
  % --- Gán nhãn các điểm ---
   \foreach \x/\y in {B/180, A/90, C/-90, D/-90, E/-90}{\fill (\x) circle(1pt) ($(\x)+(\y:0.3cm)$) node{$\x$};}
\end{tikzpicture}
        

👤 khangvotranphuc 24/01/2026 08:25

0 0

0

Code TikZ:

            \begin{tikzpicture}[scale=1, font=\footnotesize, line join=round, line cap=round,>=stealth, thick]
  \def\a{4} % Bán kính ngang
  \def\b{1.2} % Bán kính dọc (độ nghiêng)
  \def\h{2.5} % Chiều cao bể
  % Vẽ mặt nước bên trong
  \fill[cyan!30] (0,\h) ellipse ({\a-0.05} and {\b-0.05});
  \draw[cyan!50, thin] (0,\h) ellipse ({\a-0.05} and {\b-0.05});

  % Vẽ mặt ngoài thành bể phía trước
  \fill[gray!70] (180:\a) arc (180:360:{\a} and {\b}) -- (\a,\h) arc (360:180:{\a} and {\b}) -- cycle;

  % Vẽ các đường kẻ ngang (vân gỗ/nhựa) trên thành bể
  \foreach \s in {1,2,3,4,5,6} {
    \pgfmathsetmacro{\sh}{(\s-1)*\h/7 + 0.2}
    \draw[black!20, thin] (180:\a) ++(0,\sh) arc (180:360:{\a} and {\b});
  }

  % Vẽ các cột trụ đứng xung quanh bể
  \foreach \ang in {180, 202.5, 225, 247.5, 270, 292.5, 315, 337.5, 360} {
    \pgfmathsetmacro{\px}{\a*cos(\ang)}
    \pgfmathsetmacro{\py}{\b*sin(\ang)}
    % Thân cột trụ
    \fill[gray!80] (\px-0.12, \py) rectangle (\px+0.12, \py+\h);
    \draw[black!40, very thin] (\px-0.12, \py) -- (\px-0.12, \py+\h);
    \draw[black!40, very thin] (\px+0.12, \py) -- (\px+0.12, \py+\h);
    % Nắp đầu cột trụ
    \fill[gray!90] (\px-0.18, \py+\h-0.1) rectangle (\px+0.18, \py+\h+0.1);
  }
  % Vẽ vành miệng bể (Top Rim)
  \draw[gray!90, line width=5pt] (180:\a) ++(0,\h) arc (180:360:{\a} and {\b});
  \draw[gray!90, line width=5pt] (0:\a) ++(0,\h) arc (0:180:{\a} and {\b});
\end{tikzpicture}
        

👤 khangvotranphuc 23/01/2026 09:45

0 0

0

Code TikZ:

            \begin{tikzpicture}[scale=0.5, font=\footnotesize, line join=round, line cap=round, >=stealth, thick]
  % Khai báo biến
  \def\L{12}  % Chiều dài xy-lanh
  \def\R{2}   % Bán kính đáy
  \def\rx{0.6} % Bán kính trục x của elip (độ dẹt)

  % Kích thước và nhãn (màu cam)
  \draw[orange, |-|] (-2, -\R) -- (-2, \R) node[midway, left] {4 cm};
  \draw[orange, |-|] (0, \R+1.5) -- (\L, \R+1.5) node[midway, above] {12 cm};

  % Đáy sau (nét đứt)
  \draw[cyan!50!black, thin, dashed] (\L, \R) arc (90:270:{\rx} and {\R});
  \draw[cyan!50!black, thin] (\L, \R) arc (90:-90:{\rx} and {\R});

  % Vẽ các quả bóng bên trong (được vẽ trước phần thân trước để tạo độ trong suốt)
  \newcommand{\ball}[3]{ % x, y, color
    \fill[#3] (#1,#2) circle (0.7);
    \fill[white, opacity=0.4] (#1-0.25, #2+0.25) circle (0.25);
    \draw[black!20, thin] (#1,#2) circle (0.7);
  }

  % Sắp xếp các quả bóng (x, y, màu)
  \ball{1.2}{0.5}{orange}
  \ball{1.0}{-0.8}{green!70!black}
  \ball{2.5}{1.2}{red}
  \ball{2.2}{-0.2}{yellow!80!orange}
  \ball{2.8}{-1.1}{green!60!white}
  \ball{3.8}{0.5}{blue!60!cyan}
  \ball{4.2}{-0.8}{red!80!black}
  \ball{5.0}{1.3}{orange}
  \ball{5.2}{0.0}{green!70!black}
  \ball{5.8}{-1.2}{yellow!80!orange}
  \ball{6.5}{0.8}{red}
  \ball{7.0}{-0.4}{blue!70!white}
  \ball{7.8}{1.0}{orange!80!yellow}
  \ball{8.2}{-1.0}{green!60!black}
  \ball{9.2}{0.4}{red!90!black}
  \ball{9.5}{-0.9}{yellow}
  \ball{10.5}{1.1}{red}
  \ball{10.8}{-0.2}{green!80!black}

  % Thân ống
  \fill[cyan!10, opacity=0.3] (0, \R) -- (\L, \R) arc (90:-90:{\rx} and {\R}) -- (0, -\R) arc (-90:90:{\rx} and {\R});
  \draw[cyan!50!black, thin] (0, \R) -- (\L, \R);
  \draw[cyan!50!black, thin] (0, -\R) -- (\L, -\R);
  
  % Đáy trước (nét liền)
  \draw[cyan!50!black, thin] (0,0) ellipse ({\rx} and {\R});
  
  % Ánh sáng trên thủy tinh
  \fill[white, opacity=0.2] (2, 0.8*\R) rectangle (\L-2, 0.4*\R);
  \fill[white, opacity=0.15] (1, -0.2*\R) rectangle (\L-1, -0.6*\R);

  % Một quả bóng lẻ ở góc dưới (như trong hình)
  \begin{scope}[shift={(13,-3)}]
    \ball{0}{0}{orange}
  \end{scope}

  % Bóng đổ 
  \fill[gray!30, opacity=0.5] (5, -\R-0.5) ellipse (5 and 0.3);

\end{tikzpicture}
        

👤 khangvotranphuc 23/01/2026 07:34

0 0

0

Code TikZ:

            \begin{tikzpicture}[scale=1, font=\footnotesize, line join=round, line cap=round, >=stealth, thick]

\definecolor{boxblue}{HTML}{232b35}
\definecolor{logogray}{HTML}{7a8793}
\definecolor{macRed}{HTML}{ff5757}
\definecolor{macRedL}{HTML}{ffabab}
\definecolor{macOrange}{HTML}{ff8c32}
\definecolor{macOrangeL}{HTML}{ffc18f}
\definecolor{macPeach}{HTML}{febf76}
\definecolor{macPeachL}{HTML}{fee2b8}
\definecolor{macGreen}{HTML}{91d096}
\definecolor{macGreenL}{HTML}{c6e8c1}
\definecolor{macPurple}{HTML}{b179d6}
\definecolor{macPurpleL}{HTML}{d4abf0}
\definecolor{macYellow}{HTML}{fee18c}
\definecolor{macYellowL}{HTML}{fff4d6}

\filldraw[boxblue!90!black] (-0.8, 0.4) -- (4.2, 1.4) -- (4.2, 2.9) -- (-0.8, 1.9) -- cycle;
%mặt trái
\filldraw[boxblue!90!black, draw=black] (-1.8, 1.4) -- (-0.8, 0.4) -- (-0.8, 1.9) -- (-1.8, 2.9) -- cycle;
% mặt trên
\filldraw[boxblue!90!black, draw=black] (-1.8, 2.9) -- (-0.8, 1.9) -- (4.2, 2.9) -- (2.6, 3.6) -- cycle;
% Logo 
\begin{scope}[shift={(-0.2,2.6)}]
    \fill[logogray] (0,0) circle (0.45);
    \fill[boxblue] (0,0) -- (0.5, 0.3) -- (0.5, -0.3) -- cycle;
\end{scope}

% --- TRAY 
\begin{scope}[shift={(4.2, 0.2)}, rotate=110]
    \fill[boxblue!90!black] (-0.1, -0.1) rectangle (4.1, 2.1);
    \fill[black!95] (0, 0) rectangle (6, 2);
    
    
    \foreach \i/\cD/\cL in {
        0.7/macRed/macRedL, 
        1.6/macOrange/macOrangeL, 
        2.5/macPeach/macPeachL, 
        3.4/macGreen/macGreenL, 
        4.3/macPurple/macPurpleL, 
        5.2/macYellow/macYellowL%
    }{
        \begin{scope}[shift={(\i, 1)}, rotate=-90]
            \draw[fill=black, line width=1.2pt] (0,0) ellipse (0.85 and 0.52);
           
            \fill[\cD] (0, -0.12) ellipse (0.8 and 0.32);
            \draw[black, thin] (0, -0.12) ellipse (0.8 and 0.32);
    
            \fill[white!90!\cD] (0, 0.05) ellipse (0.75 and 0.1);
         
            \fill[\cD] (0, 0.22) ellipse (0.8 and 0.32);
            \draw[black, thin] (0, 0.22) ellipse (0.8 and 0.32);
           
            \begin{scope}
                \clip (0, 0.22) ellipse (0.8 and 0.32);
                \fill[\cL] (0, 0.4) ellipse (0.7 and 0.2);
            \end{scope}
        \end{scope}
    }
\end{scope}

\end{tikzpicture}
        

👤 nguyenhoangthong195 22/01/2026 00:21

0 0

0

Code TikZ:

            \begin{tikzpicture}[line cap=round,line join=round,font=\footnotesize,>=stealth,scale=1.00]
% Định nghĩa miền giá trị
\def\xmin{-1.5}
\def\xmax{3.5}
\def\ymin{-5.0}
\def\ymax{1.0}

% Cắt vùng hiển thị cho đồ thị hàm số
\begin{scope}
\clip (\xmin,\ymin) rectangle (\xmax,\ymax);

% Vẽ đồ thị hàm số
\draw[very thick,smooth, samples=200, domain=\xmin:\xmax] plot (\x, {(\x)^2 - 2*(\x) - 3});

\end{scope}

% Lưới tọa độ
\draw[step=0.5cm,help lines,dashed,opacity=1] (\xmin,\ymin) grid (\xmax,\ymax);

% Vẽ trục tọa độ (ngoài vùng cắt)
% Trục hoành Ox
\foreach \x in {-1,3}
    \draw (\x,0) -- (\x,0.1) node[below] {\x};
\draw[->] (\xmin,0)--(\xmax,0) node[above] {$x$};
% Trục tung Oy
\foreach \y in {-3}
    \draw (0,\y) -- (0.1,\y) node[left] {\y};
\draw[->] (0,\ymin)--(0,\ymax) node[left] {$y$};
% Gốc tọa độ O
\fill (0,0) circle (1pt) node[below right] {$O$};

% Giao điểm với các trục
% Thêm nhãn: node[shift={(-120:2ex)}]{$A$}
\fill (0,-3.00) circle (1pt) node[]{};
\fill (-1.00,0) circle (1pt) node[]{};
\fill (3.00,0) circle (1pt) node[]{};

% Tọa độ đỉnh parabol
\fill (1.00,-4.00) circle (1pt) node[]{};

\end{tikzpicture}
        

👤 khangvotranphuc 21/01/2026 16:20

0 0

0

Code TikZ:

            \begin{tikzpicture}[scale=1, font=\footnotesize, line join=round, line cap=round,>=stealth, thick]
    % Khai báo các điểm chính dựa trên hệ trục tọa độ (tỉ lệ: 200 đơn vị = 4cm, 75 đơn vị = 1.5cm)
    % Phương trình parabol y = (75/200^2) * x^2 => y = 0.09375 * x^2 trong TikZ
    \coordinate (O) at (0,0);
    \coordinate (A) at (-4, 1.5);
    \coordinate (B) at (4, 1.5);
    \coordinate (H) at (2, 0);
    \coordinate (C) at (2, 0.375);

    % Vẽ thân cầu và các trụ cầu (màu xanh cyan pha blue)
    \fill[blue!40] (-4.6,-0.15) rectangle (4.6,0); % Mặt cầu
    \fill[blue!40] (-4.1,-0.4) rectangle (-3.9,1.5); % Trụ trái
    \fill[blue!40] (3.9,-0.4) rectangle (4.1,1.5); % Trụ phải
    \fill[blue!40] (-4.3,-0.6) rectangle (-3.7,-0.4); % Chân trụ trái
    \fill[blue!40] (3.7,-0.6) rectangle (4.3,-0.4); % Chân trụ phải
    % Vẽ hệ trục tọa độ
    \draw[->] (-5.2,0) -- (5.2,0) node[below right] {$x$};
    \draw[->] (0,-0.7) -- (0,2.2) node[left] {$y$};
    \node[left] at (0,1.5) {75};
    \node[below] at (-4,0) {$-200$};
    \node[below] at (4,0) {$200$};

    % Vẽ các dây cáp dọc (mảnh)
    \foreach \x in {-3.5,-3,...,-0.5, 0.5, 1, 1.5, 2, 2.5, 3, 3.5} {
        \draw[thin, gray!70] (\x, 0) -- (\x, {0.09375*\x*\x});
    }

    % Vẽ dây cáp chính (đường Parabol)
    \draw[ultra thick, black!85] plot[domain=-4:4, samples=100] (\x, {0.09375*\x*\x});

    % Vẽ các đường nét đứt và kích thước
    \draw[dashed, thin] (-4, 1.5) -- (4, 1.5);
    \draw[<->, dashed] (4.4, 0) -- (4.4, 1.5) node[midway, right] {75};
    \draw[<->] (0, -0.4) -- (2, -0.4) node[midway, below] {100};
    \draw[<->] (-4, -1.1) -- (0, -1.1) node[midway, below] {200};
    \draw[<->] (0, -1.1) -- (4, -1.1) node[midway, below] {200};

    % Đánh dấu các điểm A, B, C, O, H và gán nhãn
    \foreach \p/\pos in {A/above, B/above, C/above, O/above left, H/above right} {
        \fill (\p) circle (1.5pt) node[\pos] {$\p$};
    }
    % Chú thích "Dây cáp"
    \draw[<-] (-2.2, 0.45) -- (-1.8, 0.9) node[above right] {Dây cáp};
    % Nhãn hình
    \node[below=1.6cm] at (0,0) {Hình 6.1};

\end{tikzpicture}
        

👤 khangvotranphuc 21/01/2026 16:08

0 0

0

Code TikZ:

            \begin{tikzpicture}[scale=1, font=\footnotesize, line join=round, line cap=round, >=stealth, thick]
  \def\a{1.8} % Bán kính đáy (tương ứng 11cm)
  \def\b{0.5} % Bán kính elip phối cảnh
  \def\h{4.8} % Chiều cao thân (tương ứng 30cm)

  % Vẽ bóng và màu cho thân thùng rác
  \fill[gray!80] (-\a,0) -- (-\a,\h) arc (180:360:{\a} and {\b}) -- (\a,0) arc (360:180:{\a} and {\b}) -- cycle;
  
  % Vẽ nắp thùng (lid) có độ dày
  \fill[gray!90] (-\a,\h) -- (-\a,\h+0.3) arc (180:360:{\a} and {\b}) -- (\a,\h) arc (360:180:{\a} and {\b}) -- cycle;
  \fill[gray!70] (0,\h+0.3) ellipse ({\a} and {\b});
  \draw (0,\h+0.3) ellipse ({\a} and {\b});
  \draw (-\a,\h+0.3) -- (-\a,\h) arc (180:360:{\a} and {\b}) -- (\a,\h+0.3);
  
  % Vẽ gờ ở đáy
  \fill[gray!90] (-\a,0) -- (-\a,-0.15) arc (180:360:{\a} and {\b}) -- (\a,0) arc (360:180:{\a} and {\b}) -- cycle;
  \draw (-\a,-0.15) arc (180:360:{\a} and {\b}) -- (\a,0);
  \draw (-\a,0) -- (-\a,-0.15);

  % Vẽ các đường biên thân thùng
  \draw (-\a,0) -- (-\a,\h);
  \draw (\a,0) -- (\a,\h);
  \draw (-\a,0) arc (180:360:{\a} and {\b});
  \draw[dashed] (-\a,0) arc (180:0:{\a} and {\b});
  \draw (-\a,\h) arc (180:360:{\a} and {\b});
  \draw[dashed] (-\a,\h) arc (180:0:{\a} and {\b});

  % Các đường dóng kích thước
  \draw[dashed] (0,-0.6) -- (0,\h+0.8);
  \draw[dashed] (\a,-0.6) -- (\a,\h+0.8);
  \draw[dashed] (-\a,\h+0.3) -- (\a,\h+0.3);

  % Chữ "THÙNG RÁC" ở giữa thân thùng
  \node at (0,0.5*\h+0.1) {\color{white}\bfseries\sffamily\large THÙNG RÁC};

  % Ghi chú kích thước (màu cyan như trong hình)
  \draw[cyan!80!black, <->] (0,\h+0.8) -- (\a,\h+0.8) node[midway, above] {11 cm};
  \draw[cyan!80!black, <->] (0,-0.6) -- (\a,-0.6) node[midway, below] {11 cm};
  \draw[cyan!80!black, <->] (\a+0.4,-0.15) -- (\a+0.4,\h+0.3) node[midway, sloped, below] {30 cm};

\end{tikzpicture}
        

👤 khangvotranphuc 21/01/2026 16:05

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0

Code TikZ:

            \begin{tikzpicture}[scale=1, font=\footnotesize, line join=round, line cap=round, >=stealth, thick]
  % Kích thước lon sữa
  \def\a{2.2} % Bán kính trục lớn
  \def\b{0.7} % Bán kính trục nhỏ
  \def\h{5}   % Chiều cao

  % Màu nền thân lon (phần nhãn)
  \fill[blue!10] (-\a,0) -- (-\a,\h) arc (180:360:{\a} and {\b}) -- (\a,0) arc (360:180:{\a} and {\b}) -- cycle;
  \fill[blue!10] (0,0) ellipse ({\a} and {\b});

  % Vẽ nắp lon với các vòng tròn đồng tâm (như trong hình)
  \foreach \i in {1, 0.9, 0.8, 0.7, 0.6}{
    \draw[fill=gray!20] (0,\h) ellipse ({\a*\i} and {\b*\i});
  }

  % Vẽ các đường biên đứng của lon
  \draw (-\a,0) -- (-\a,\h);
  \draw (\a,0) -- (\a,\h);

  % Vẽ đáy lon (nét đứt phía sau và nét liền phía trước)
  \draw (-\a,0) arc (180:360:{\a} and {\b});
  \draw[dashed, gray!60] (-\a,0) arc (180:0:{\a} and {\b});

  % Hình tròn màu hồng/cam trên nhãn
  \fill[orange!30!pink!60, opacity=0.9] (0, 2.5) circle (1.3);

  % Hiệu ứng sữa văng (splash) ở phía dưới đáy
  \fill[white] (-\a, 0.3) .. controls (-1.5, 1.5) and (-0.5, 0.3) .. (0, 1) 
                 .. controls (0.5, 1.8) and (1.5, 0.4) .. (\a, 0.4) 
                 -- (\a,0) arc (360:180:{\a} and {\b}) -- cycle;
  
  % Các đốm trắng trang trí trên nhãn
  \foreach \p in {(-1.6,4.1), (-1.2,3.6), (1.5,4.3), (1.1,2.8), (-0.9,2.2), (1.7,1.6), (-1.8, 1.2)}
    \fill[white] \p circle (1.5pt);

  % Chữ trên nhãn
  \node[blue!60!black, font=\sffamily\bfseries\huge] at (0, 3.1) {SỮA};
  \node[blue!60!black, font=\sffamily\bfseries\huge] at (0, 2.0) {ĐẶC};

  % Vẽ lại cung đáy cho rõ nét
  \draw (-\a,0) arc (180:360:{\a} and {\b});
\end{tikzpicture}
        

👤 khangvotranphuc 18/01/2026 12:49

1 1

1

Code TikZ:

            \begin{tikzpicture}[scale=1, font=\footnotesize, line join=round, line cap=round, >=stealth, thick]
% Vẽ lá dong 
\filldraw[fill=green!50!black, draw=green!20!black]
    (0,-3) .. controls (-5,-2) and (-3,3) .. (0,7)
           .. controls (3,3) and (5,-2) .. (0,-3) -- cycle;
% Vẽ gân lá
\draw[green!40!black, thin] (0,-3) -- (0,5);
\foreach \y in {-2,-1,0,1,2,3,4} {
    \draw[green!30!black, thin] (0,\y) -- ++(25:1.5);
    \draw[green!30!black, thin] (0,\y) -- ++(155:1.5);
}
% Phần gạo trắng 
\foreach \i in {1,...,2000} {
    \pgfmathsetmacro{\rx}{rand*2.5}
    \pgfmathsetmacro{\ry}{0.5 + rand*1.8}
    \pgfmathsetmacro{\ang}{rand*180}
    % Điều kiện để các hạt gạo nằm trong một vùng elip nhất định
    \pgfmathparse{(\rx/2.5)^2 + ((\ry-0.5)/1.8)^2 < 1 ? 1 : 0}
    \ifdim\pgfmathresult pt=1pt
        \fill[white, draw=gray!10, thin, rotate around={\ang:(\rx,\ry)}] (\rx,\ry) ellipse (0.09 and 0.05);
    \fi
}
% Phần nhân đỗ màu vàng 
\foreach \i in {1,...,580} {
    \pgfmathsetmacro{\rx}{rand*1.4}
    \pgfmathsetmacro{\ry}{0.5 + rand*0.8}
    \pgfmathparse{(\rx/1.4)^2 + ((\ry-0.5)/0.8)^2 < 1 ? 1 : 0}
    \ifdim\pgfmathresult pt=1pt
        \fill[yellow!85!orange, draw=yellow!60!black, thin] (\rx,\ry) circle (0.1);
    \fi
}
% Vài hạt gạo lẻ rơi bên ngoài 
\foreach \i in {1,...,15} {
    \pgfmathsetmacro{\rx}{rand*3.5}
    \pgfmathsetmacro{\ry}{-1 + rand*0.5}
    \fill[white, draw=gray!20, rotate={rand*90}] (\rx,\ry) ellipse (0.08 and 0.04);
}

\end{tikzpicture}
        

👤 khangvotranphuc 18/01/2026 12:16

1 1

0

Code TikZ:

            \begin{tikzpicture}[scale=1, font=\footnotesize, line join=round, line cap=round, >=stealth, thick]
% Background space
\fill[black!95] (-9,-6) rectangle (9,6);
% Random stars
\foreach \i in {1,...,50} {
    \fill[white, opacity={0.3+0.7*rand}] ({rand*6.8},{rand*3.8}) circle ({0.01+0.02*rand});
}

% Orbits (Ellipses)
\foreach \r in {2.2, 3.2, 4.2, 5.2, 8.5} {
    \draw[white, opacity=0.25, thin] (0,0) ellipse ({\r} and {\r*0.5});
}

% Asteroid Belt
\draw[gray, line width=5pt, opacity=0.3, dash pattern=on 2pt off 3pt] (0,0) ellipse (6.8 and 3.4);
\foreach \i in {1,...,150} {
    \pgfmathsetmacro{\ang}{rand*360}
    \pgfmathsetmacro{\rad}{6.5 + 0.6*rand}
    \fill[gray!60, opacity=0.5] ({\ang}:{\rad} and {\rad*0.5}) circle (0.04);
}

% Sun (Mặt Trời)
\shade[inner color=yellow!90!orange, outer color=orange!80!red] (0,0) circle (1);
\node[white, below] at (0,-1) {Mặt Trời};

% Mercury (Thủy tinh)
\coordinate (Mercury) at (40:2.2 and 1.1);
\shade[ball color=brown!70!gray] (Mercury) circle (0.2);
\node[white, above=2pt] at (Mercury) {Thủy tinh};

% Earth (Trái Đất)
\coordinate (Earth) at (-15:4.2 and 2.1);
\shade[ball color=blue!60!green] (Earth) circle (0.4);
\node[white, above=10pt] at (Earth) {Trái Đất};

% Jupiter (Mộc tinh)
\coordinate (Jupiter) at (25:8.5 and 4.25);
\begin{scope}
    \clip (Jupiter) circle (0.7);
    \shade[ball color=gray!30!blue!20] (Jupiter) circle (0.7);
    \foreach \y in {-0.4,-0.2,0,0.2,0.4} {
        \draw[white!50!gray, line width=1pt, opacity=0.3] ($(Jupiter)+(-0.8,\y)$) -- ($(Jupiter)+(0.8,\y)$);
    }
\end{scope}
\node[white, above=15pt] at (Jupiter) {Mộc tinh};
% Comet effect (top middle)
\draw[white, line width=1pt, opacity=0.5, -] (0,3) -- (1,4);
\fill[white, opacity=0.8] (0,3) circle (0.05);

\end{tikzpicture}
        

👤 nguyentanquang0106 16/01/2026 18:59

0 0

0

Code TikZ:

            \begin{tikzpicture}
\begin{axis}[
    title={Mô phỏng Quá trình Gaussian White Noise $W_t \sim \mathcal{N}(0, \sigma^2)$},
    xlabel={$t$},
    ylabel={$W_t$},
    width=12cm,
    height=6cm,
    grid=major,
    ymin=-3.5, ymax=3.5,
    xmin=0, xmax=100,
    samples=100,
    domain=0:100
]
    % Vẽ các điểm nhiễu trắng
    \addplot[
        blue,
        mark=none,
        thick,
        % Sử dụng tổng của các số ngẫu nhiên để mô phỏng phân phối chuẩn (Định lý giới hạn trung tâm)
        % Hoặc đơn giản là dùng hàm invgauss nếu có thư viện hỗ trợ. 
        % Ở đây dùng tổng 6 số ngẫu nhiên đơn giản:
    ] { (rnd + rnd + rnd + rnd + rnd + rnd - 3) * 1.2 }; 
    
    % Đường trung bình E[epsilon] = 0
    \draw[red, dashed, thick] (axis cs:0,0) -- (axis cs:100,0) 
        node[right, pos=1] {$\mathbb{E}[\epsilon_t]=0$};

\end{axis}
\end{tikzpicture}
        

👤 khangvotranphuc 12/01/2026 11:08

1 1

0

Code TikZ:

            \begin{tikzpicture}[scale=1, font=\footnotesize, line join=round, line cap=round, >=stealth, thick]
  % Định nghĩa màu gỗ
  \definecolor{woodlight}{RGB}{245,210,140}
  \definecolor{wooddark}{RGB}{120,60,20}
  \definecolor{woodmed}{RGB}{190,120,50}

  % Vẽ khung ngoài hộp gỗ
  \fill[woodlight] (0,0) rectangle (10,3);
  
  % Vẽ lòng trong của hộp với hiệu ứng 3D
  % Mặt sau (đáy hộp bên trong)
  \fill[wooddark] (0.6,0.6) rectangle (9.4,2.4);
  
  % Các mặt bên trong (tạo chiều sâu)
  \fill[woodmed] (0.3,0.3) -- (9.7,0.3) -- (9.4,0.6) -- (0.6,0.6) -- cycle; % Mặt đáy
  \fill[woodmed!80!black] (0.3,2.7) -- (9.7,2.7) -- (9.4,2.4) -- (0.6,2.4) -- cycle; % Mặt trên
  \fill[woodmed!70!black] (9.7,0.3) -- (9.7,2.7) -- (9.4,2.4) -- (9.4,0.6) -- cycle; % Mặt phải
  \fill[woodmed!70!black] (0.3,0.3) -- (0.3,2.7) -- (0.6,2.4) -- (0.6,0.6) -- cycle; % Mặt trái

  % Vẽ các quyển sách (mỗi quyển một màu)
  \def\bookwidth{0.7}
  \def\bookheight{2.1}
  \foreach \col [count=\i from 0] in {blue!70!black, red!70!black, green!50!black, yellow} {
    \pgfmathsetmacro\posx{0.3 + \i*\bookwidth}
    % Vẽ hiệu ứng khối cho gáy sách
    \shade[left color=\col, right color=\col!50!black, middle color=\col!80!white] 
      (\posx, 0.3) rectangle (\posx+\bookwidth, 0.3+\bookheight);
    \draw[black!60, thin] (\posx, 0.3) rectangle (\posx+\bookwidth, 0.3+\bookheight);
  }

  % Đường kích thước bên trên (120 cm)
  \draw[red, |<->|] (0,3.3) -- (10,3.3) node[midway, above, black] {$120$ cm};
  % Đường kích thước cho một quyển sách bên dưới (2,4 cm)
  \draw[red, |<->|] (0.3,-0.2) -- (0.3+\bookwidth,-0.2) node[midway, below,black] {$2{,}4$ cm};
 
\end{tikzpicture}
        

👤 khangvotranphuc 12/01/2026 10:58

1 1

0

Code TikZ:

            \begin{tikzpicture}[scale=1, font=\footnotesize, line join=round, line cap=round,>=stealth, thick]

  % Vẽ cành hoa (Stem)
  \draw[green!40!black, line width=2pt] (0,-1) .. controls (0.2,1) and (-0.2,2) .. (0,3.5);
  % Vẽ các lá và số trên lá
  % Lá số 10 (trên cùng bên trái)
  \begin{scope}[shift={(-0.15,2.1)}, rotate=150]
    \fill[green!60!black] (0,0) .. controls (0.5,0.6) and (1.5,0.6) .. (1.5,0) .. controls (1.5,-0.6) and (0.5,-0.6) .. (0,0);
    \node[white] at (0.9,0) {\bfseries 10};
  \end{scope}

  % Lá số -2 (trên cùng bên phải)
  \begin{scope}[shift={(0,2)}, rotate=30]
    \fill[green!60!black] (0,0) .. controls (0.5,0.5) and (1.2,0.5) .. (1.2,0) .. controls (1.2,-0.5) and (0.5,-0.5) .. (0,0);
    \node[white] at (0.7,0) {\bfseries -2};
  \end{scope}

  % Lá số 4 (dưới bên phải)
  \begin{scope}[shift={(0,1.3)}, rotate=-10]
    \fill[green!60!black] (0,0) .. controls (0.5,0.6) and (1.5,0.6) .. (1.5,0) .. controls (1.5,-0.6) and (0.5,-0.6) .. (0,0);
    \node[white] at (0.9,0) {\bfseries 4};
  \end{scope}

  % Lá số -25 (dưới cùng bên trái)
  \begin{scope}[shift={(0,0.7)}, rotate=170]
    \fill[green!60!black] (0,0) .. controls (0.5,0.7) and (1.7,0.7) .. (1.7,0) .. controls (1.7,-0.7) and (0.5,-0.7) .. (0,0);
    \node[white] at (1.1,0) {\bfseries -25};
  \end{scope}

  % Vẽ cánh hoa (Petals)
  \foreach \a in {0,40,...,340}{
    \fill[orange!80!red] (0,3.5) ++(\a:0.6) circle (0.25);
  }

  % Vẽ nhụy hoa (Center)
  \fill[yellow!90!orange] (0,3.5) circle (0.5);
  \node[white] at (0,3.5) {\bfseries -105};

  % Chú thích dưới hình
  \node at (0,-1.5) {Hình 1.9};

\end{tikzpicture}
        

👤 huongnamvuphuong 04/01/2026 14:40

1 1

0

Code TikZ:

            \begin{tikzpicture}[
		background rectangle/.style={fill=bg},
		scale=0.6,
	font=\footnotesize
		]
			\definecolor{bg}{RGB}{245,245,245}
		\definecolor{wood}{RGB}{80,50,20}
		\definecolor{tankbody}{RGB}{220,220,220}
		\definecolor{tankblue}{RGB}{0,80,180}
		\definecolor{housebody}{RGB}{200,150,100}
		\definecolor{houseroof}{RGB}{80,50,30}
		\definecolor{fire1}{RGB}{255,50,0}
		\definecolor{fire2}{RGB}{255,140,0}
		\definecolor{fire3}{RGB}{255,220,0}
		% --- GEOMETRY DEFINITION ---
		% Scale: 1 unit approx 300m
		% D at origin
		\coordinate (D) at (0,0);
		% A at 1800m (6 units) at 34 degrees
		\coordinate (A) at (34:6);
		% B at 900m (3 units) at -35 degrees
		\coordinate (B) at (-35:3);
		% C calculated to satisfy angle DBC = 125 degrees
		% Vector BD angle is 145 deg. Vector BC angle must be 20 deg.
		% Intersection of y=0 (from D) and line from B at 20 deg gives x approx 7.18
		\coordinate (C) at (7.18,0);
		
		% --- DRAWING LINES ---
		\draw[thick, black] (D) -- (A);
		\draw[thick, black] (D) -- (B);
		\draw[thick, black] (D) -- (C);
		\draw[thick, black] (A) -- (C);
		\draw[thick, black] (B) -- (C);
		
		% --- LABELS & ANGLES ---
		
		% Distance Labels (Horizontal as in image)
	%	\node[above left, xshift=10pt, yshift=5pt] at ($(D)!0.5!(A)$) { 1800m};
		%\node[below left, xshift=10pt, yshift=-5pt] at ($(D)!0.5!(B)$) { 900m};
		
		% Angle at D (Top)
	%	\draw[thick] ($(D) + (1.2,0)$) arc (0:34:1.2);
		%\node at ($(D) + (17:1.6)$) { 34$^\circ$};
		\draw pic[draw, angle radius=3mm] {right angle = D--A--C};
		% Angle at D (Bottom)
	%	\draw[thick] ($(D) + (1.2,0)$) arc (0:-35:1.2);
	%	\node at ($(D) + (-17:1.6)$) { 35$^\circ$};
		
		% Angle at B
		% Arc from approx 20 deg to 145 deg
	%	\draw[thick] ($(B) + (0.5,0.18)$) arc (20:145:0.5);
	%%	\node at ($(B) + (80:0.8)$) { 125$^\circ$};
		
		% Vertex Labels
		\node[left, xshift=-5pt] at (D) { D};
		\node[right, xshift=5pt, yshift=-10pt] at (C) { C};
		% A and B labels are part of the tank drawings below
		
		% --- ILLUSTRATIONS ---
		
		% 1. Watchtower at D
		% Positioned so the platform railing corner is at D
		\begin{scope}[shift={(D)}, xshift=-0.56cm, yshift=-2.03cm, scale=0.35]
			% Legs
			\draw[wood, line width=2pt] (-1.5,-6) -- (-0.5,6);
			\draw[wood, line width=2pt] (1.5,-6) -- (0.5,6);
			\draw[wood, line width=1.5pt] (-0.8,-6) -- (-0.2,6);
			\draw[wood, line width=1.5pt] (0.8,-6) -- (0.2,6);
			
			% Cross bracing
			\foreach \y in {-4,-2,0,2,4} {
				\draw[wood, thick] (-1.3,\y-2) -- (1.3,\y);
				\draw[wood, thick] (1.3,\y-2) -- (-1.3,\y);
				\draw[wood, thick] (-1.4,\y) -- (1.4,\y);
			}
			
			% Hut Base/Platform
			\fill[wood!60!black] (-1.6,5) rectangle (1.6, 6);
			
			% Hut Body
			\fill[wood!80!black] (-1.2,6) rectangle (1.2, 8);
			
			% Windows
			\fill[cyan!20] (-1.0,6.5) rectangle (-0.4, 7.5);
			\fill[cyan!20] (-0.3,6.5) rectangle (0.3, 7.5);
			\fill[cyan!20] (0.4,6.5) rectangle (1.0, 7.5);
			\draw[wood, thin] (-1.0,6.5) rectangle (-0.4, 7.5);
			\draw[wood, thin] (-0.3,6.5) rectangle (0.3, 7.5);
			\draw[wood, thin] (0.4,6.5) rectangle (1.0, 7.5);
			
			% Roof
			\fill[black!80] (-1.8,8) -- (0,9.5) -- (1.8,8) -- cycle;
			
			% Flag
			\draw[thick] (-1.5, 8) -- (-1.5, 10);
			\fill[black] (-1.5, 9.8) -- (-0.8, 9.5) -- (-1.5, 9.2);
			
			% Railing details
			\draw[wood, thick] (-1.6, 5.8) -- (1.6, 5.8);
			\foreach \x in {-1.5, -1, ..., 1.5} \draw[wood] (\x,5) -- (\x,5.8);
		\end{scope}
		
		% 2. Tank A at A
		% Positioned so bottom center is at A
		\begin{scope}[shift={(A)}, yshift=0.6cm, scale=0.4]
			% Legs
			\foreach \x in {-1, -0.4, 0.4, 1} \draw[thick] (\x,-1.5) -- (\x,-2);
			
			% Cylinder Body
			\shade[left color=white, right color=tankbody!80!black] (-1.5,-1.5) rectangle (1.5,1.5);
			\draw[gray] (-1.5,-1.5) -- (-1.5,1.5);
			\draw[gray] (1.5,-1.5) -- (1.5,1.5);
			
			% Rings
			\draw[tankblue, line width=2pt] (-1.5, -0.5) arc (180:360:1.5 and 0.2);
			\draw[tankblue, line width=2pt] (-1.5, 0.5) arc (180:360:1.5 and 0.2);
			
			% Top/Bottom
			\draw[fill=tankbody!50] (0,1.5) ellipse (1.5 and 0.3);
			\draw[gray] (-1.5,-1.5) arc (180:360:1.5 and 0.3);
			
			% Pipe on top
			\draw[thick] (0,1.5) -- (0,2) -- (0.5,2) -- (0.5,1.8);
			
			% Label
			\node at (0,0.2) { A};
		\end{scope}
		
		% 3. Tank B at B
		% Positioned so top center is at B
		\begin{scope}[shift={(B)}, yshift=-0.6cm, scale=0.4]
			% Legs
			\foreach \x in {-1, -0.4, 0.4, 1} \draw[thick] (\x,-1.5) -- (\x,-2);
			
			% Cylinder Body
			\shade[left color=white, right color=tankbody!80!black] (-1.5,-1.5) rectangle (1.5,1.5);
			\draw[gray] (-1.5,-1.5) -- (-1.5,1.5);
			\draw[gray] (1.5,-1.5) -- (1.5,1.5);
			
			% Rings
			\draw[tankblue, line width=2pt] (-1.5, -0.5) arc (180:360:1.5 and 0.2);
			\draw[tankblue, line width=2pt] (-1.5, 0.5) arc (180:360:1.5 and 0.2);
			
			% Top/Bottom
			\draw[fill=tankbody!50] (0,1.5) ellipse (1.5 and 0.3);
			\draw[gray] (-1.5,-1.5) arc (180:360:1.5 and 0.3);
			
			% Pipe on top
			\draw[thick] (0,1.5) -- (0,2) -- (0.5,2) -- (0.5,1.8);
			
			% Label
			\node at (0,0.2) { B};
		\end{scope}
		
		% 4. House C at C
		% Positioned so left roof tip is at C
		\begin{scope}[shift={(C)}, xshift=0.72cm, yshift=-0.2cm, scale=0.4]
			% House Body
			\fill[housebody] (-1.5,-1.5) rectangle (1.5,0.5);
			
			% Roof
			\fill[houseroof] (-1.8,0.5) -- (0,2) -- (1.8,0.5) -- cycle;
			
			% Door
			\fill[brown!30!black] (-0.3,-1.5) rectangle (0.3,-0.2);
			\fill[yellow!80!black] (0.2,-0.9) circle (0.05); % doorknob
			
			% Windows
			\fill[orange!80!black] (-1.2,-0.8) rectangle (-0.6,-0.2);
			\draw[brown!30!black, thick] (-0.9,-0.8) -- (-0.9,-0.2);
			\draw[brown!30!black, thick] (-1.2,-0.5) -- (-0.6,-0.5);
			\draw[brown!30!black, thick] (-1.2,-0.8) rectangle (-0.6,-0.2);
			
			\fill[orange!80!black] (0.6,-0.8) rectangle (1.2,-0.2);
			\draw[brown!30!black, thick] (0.9,-0.8) -- (0.9,-0.2);
			\draw[brown!30!black, thick] (0.6,-0.5) -- (1.2,-0.5);
			\draw[brown!30!black, thick] (0.6,-0.8) rectangle (1.2,-0.2);
			
			% Fire
			\begin{scope}[yshift=1.5cm, scale=1.2]
				\fill[fire1] (-1,0) .. controls (-1.2,1.5) and (-0.5,0.5) .. (0,2.5) .. controls (0.5,0.5) and (1.2,1.5) .. (1,0) -- cycle;
				\fill[fire2] (-0.8,0) .. controls (-0.9,1) and (-0.3,0.4) .. (0,1.8) .. controls (0.3,0.4) and (0.9,1) .. (0.8,0) -- cycle;
				\fill[fire3] (-0.5,0) .. controls (-0.6,0.6) and (-0.2,0.3) .. (0,1.2) .. controls (0.2,0.3) and (0.6,0.6) .. (0.5,0) -- cycle;
			\end{scope}
		\end{scope}
		
	\end{tikzpicture}
        

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