如何在两个顶点之间画虚线？

Question

问题：我想在点 E 和 F 之间画一条虚线

梅威瑟：

\documentclass[12pt]{article}
\usepackage{pgf,tikz,pgfplots}
\usetikzlibrary{arrows}
\begin{document}
    \begin{tikzpicture}
    \draw [line width=0.5pt] (-2,4)-- (2,4);
    \draw [line width=0.5pt] (-2,4)-- (-3,0);
    \draw [line width=0.5pt] (-3,0)-- (3,0);
    \draw [line width=0.5pt] (2,4)-- (3,0);
    \draw [line width=0.5pt] (-2,4)-- (3,0);
    \draw [line width=0.5pt] (-3,0)-- (2,4);
    \draw [line width=0.5pt] (-2.4,2.40)-- (2.40,2.40);
    \draw[color=black] (-2.00,4.4) node {$A$};
    \draw[color=black] (2.0,4.4) node {$B$};
    \draw[color=black] (-3.25,0.00) node {$C$};
    \draw[color=black] (3.25,0.00) node {$D$};
    \draw[color=black] (-2.65,2.45) node {$E$};
    \draw[color=black] (2.65,2.40) node {$F$};
    \end{tikzpicture}
\end{document}

Answer 1

只需在相应的命令中添加dotted选项：draw

\documentclass[12pt]{article}
\usepackage{pgf,tikz,pgfplots}
\usetikzlibrary{arrows}
\begin{document}
    \begin{tikzpicture}
    \draw [line width=0.5pt] (-2,4)-- (2,4);
    \draw [line width=0.5pt] (-2,4)-- (-3,0);
    \draw [line width=0.5pt] (-3,0)-- (3,0);
    \draw [line width=0.5pt] (2,4)-- (3,0);
    \draw [line width=0.5pt] (-2,4)-- (3,0);
    \draw [line width=0.5pt] (-3,0)-- (2,4);
    \draw [line width=0.5pt, dotted] (-2.4,2.40)-- (2.40,2.40); %<-----
    \draw[color=black] (-2.00,4.4) node {$A$};
    \draw[color=black] (2.0,4.4) node {$B$};
    \draw[color=black] (-3.25,0.00) node {$C$};
    \draw[color=black] (3.25,0.00) node {$D$};
    \draw[color=black] (-2.65,2.45) node {$E$};
    \draw[color=black] (2.65,2.40) node {$F$};
    \end{tikzpicture}
\end{document}