如何在三角形的一侧画一个矩形？

Question

我正在尝试在一侧绘制一个像这张图片一样的矩形。

我试过

\documentclass[border=0.5cm]{standalone}
\usepackage{tikz}
\begin{document} 
    \begin{tikzpicture}[line join = round, line cap = round;]
    \path 
    (0,0) coordinate (A)
(3,0) coordinate (B)
(0,2) coordinate (C)    
    ;
    \draw (A) -- (B) -- (C) -- cycle
 (B) --(5,0) ;
\foreach \p/\g in {A/-90,B/-90,C/90}
\path (\p)+(\g:2.5mm) node{$\p$};
\end{tikzpicture}   

\end{document}

并得到

Answer 1

您可以旋转\draw添加选项：

\documentclass[tikz,border=0.5cm]{standalone}

\begin{document} 
\begin{tikzpicture}[line join = round, line cap = round;]
\path (0,0) coordinate (A)
      (3,0) coordinate (B)
      (0,2) coordinate (C);
\draw (5,0) -- (A) node[below] {$A$} -- (C) node[above] {$C$} -- (B) node[below] {$B$};
\draw[rotate={-atan(2/3)},transform shape] (C) rectangle ++ (1,0.8) node[midway] {$m$};
\end{tikzpicture}
\end{document}