Hallo zusammen, Ich bin gerad folgendes am Zeichnen: \begin{tikzpicture} \coordinate (A) at (0,0); \coordinate (B) at (2,0); \coordinate (C) at (5,0); \coordinate [label = above:$S$] (S) at (2.5, 4); \draw (A) -- (B) -- (C) -- (S) -- cycle; \draw (A) -- ++(0, -.2); \draw (B) -- ++(0, -.2); \draw (C)...