![Tikz 在三角形上画线](https://linux22.com/image/322591/Tikz%20%E5%9C%A8%E4%B8%89%E8%A7%92%E5%BD%A2%E4%B8%8A%E7%94%BB%E7%BA%BF.png)
我想知道你们中是否有人知道如何画出这幅图中的线条?我画三角形和天使本身没有任何问题,只是画出穿过角度的线条?
\begin{tikzpicture}[scale=1.25]%,cap=round,>=latex]
\coordinate [label=left:$A$] (A) at (-2cm,-1.cm);
\coordinate [label=right:$C$] (C) at (2.2cm,-1.0cm);
\coordinate [label=above:$B$] (B) at (1cm,1.0cm);
\draw (A) -- node[sloped,above] {c} (B) -- node[sloped,above] {a} (C) -- node[below] {b} (A);
\end{tikzpicture}