Stufenwinkel/Scheitelwinkel/Nebenwinkel in TikZ

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\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{angles,quotes,intersections}
\tikzset{
  angle radius=0.75cm
}
\begin{document}
\section*{Nebenwinkel}
\begin{tikzpicture}
  \draw[name path=A] (0,0) coordinate (A) -- (5,0) coordinate (B);
  \draw[name path=B] (1,2) coordinate (C) -- (3,-1) coordinate (D);
  \path[name intersections={of=A and B,name=i}];
  \draw pic["$\alpha$", draw=red, ->] {angle=B--i-1--C};
  \draw pic["$\beta$", draw=blue, ->] {angle=C--i-1--A};
\end{tikzpicture}
\section*{Scheitelwinkel}
\begin{tikzpicture}
  \draw[name path=A] (0,0) coordinate (A) -- (5,0) coordinate (B);
  \draw[name path=B] (1,2) coordinate (C) -- (3,-1) coordinate (D);
  \path[name intersections={of=A and B,name=i}];
  \draw pic["$\alpha$", draw=red, ->] {angle=D--i-1--B};
  \draw pic["$\alpha'$", draw=blue, ->] {angle=C--i-1--A};
\end{tikzpicture}
\section*{Stufenwinkel}
\begin{tikzpicture}
  \draw[name path=A] (0,0) coordinate (A) -- (5,0) coordinate (B);
  \draw[name path=B] (1,2) coordinate (C) -- (3,-1) coordinate (D);
  \draw[name path=C] (0,1) coordinate (E) -- (5,1) coordinate (F);
  \path[name intersections={of=A and C,name=i}];
  \path[name intersections={of=B and C,name=j}];
  \draw pic["$\alpha$", draw=red, ->] {angle=C--i-1--A};
  \draw pic["$\alpha'$", draw=blue, ->] {angle=C--j-1--E};
\end{tikzpicture}
\end{document}
 
 
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