平均能量损失

Question

大家好，我需要一点帮助。我需要使用 tikZ 制作以下梯形。

到目前为止我有这个：

\documentclass[tikz]{standalone}
\usetikzlibrary{shapes.geometric}
\begin{document}
\begin{tikzpicture}[line width = 1.5pt]
\node (a)
[shape=trapezium,
trapezium left angle=82,
trapezium right angle=41,
draw,
minimum height=2.1*1cm] {};


\node [below right] at (a.top left corner) {$\alpha$};
\node [below left] at (a.top right corner) {$\beta$}; 
\node [above right] at ([xshift=.1cm]a.bottom left corner) {82};
\node [above left] at ([xshift=-.4cm]a.bottom right corner) {42}; 
\node(v1) at (-1,1){};
\draw(v1) -- (-2,1);
\end{tikzpicture}
\end{document}

这是我得到的：

你能帮我么

Answer 1

有一个库可以实现这一点。该angles库提供了一个适当地称为的内置pic类型angle，如果您定义三个坐标(A) (B)和(C)，其中B是顶点，并且发出将在和线\pic{angle}之间绘制一条角度线。或者您可以说，其中s 是先前定义的坐标。如果您还希望像示例图片中那样绘制 //，您可以为其定义一个新类型。A--BB--C\pic{angle=C1--C2--C3}Cpic

平均能量损失

\documentclass[tikz]{standalone}
\usetikzlibrary{shapes.geometric, angles, quotes}
\begin{document}
\begin{tikzpicture}[draw angle/.style args={#1--#2--#3 with #4}{%
                        insert path={%
                            foreach \i/\j in {#1/A,#2/B,#3/C}{(\i) coordinate (\j)}%
                            pic[angle style, #4]{angle}}
                            },
                    angle style/.style={draw, thin},
                    bars/.pic={\draw (80:-0.5) -- (80:0.5) ++(0:.1) -- ++(80:-1);},
                    line width = 1.5pt]
\node[draw, 
      shape=trapezium,
      trapezium left angle=82,
      trapezium right angle=41,
      minimum height=2.1*1cm] (a) {};
\path (a.bottom left corner) coordinate (T1)
      (a.top left corner) coordinate (T2)
      (a.top right corner) coordinate (T3)
      (a.bottom right corner) coordinate (T4);
\draw[draw angle={T4--T1--T2 with {angle radius=2.4em, "$82^\circ$"}},
      draw angle={T1--T2--T3 with "$\alpha$"},
      draw angle={T2--T3--T4 with "$\beta$"},
      draw angle={T3--T4--T1 with {angle radius=3.2em, angle eccentricity=0.7, "$41^\circ$"}}];
\draw ([shift={(.5*\pgflinewidth,.5*\pgflinewidth)}]T1) ++(-1,0) coordinate (tmp) -- pic[pos=.3,thin, scale=0.5]{bars}([shift={(.5*\pgflinewidth,.5*\pgflinewidth)}]T1);
\draw ([shift={(.5*\pgflinewidth,-.5*\pgflinewidth)}]tmp|-T2) -- pic[pos=.3,thin, scale=0.5]{bars} ([shift={(.5*\pgflinewidth,-.5*\pgflinewidth)}]T2);
\end{tikzpicture}
\end{document}

结果