[dk-tug] Hvorfor er dette tikz billede ikke symmetrisk?

\documentclass[a4paper]{memoir}
\usepackage{tikz}
\begin{document}

  \begin{tikzpicture}
     \coordinate (a) at (-2.5,2.2);
     \coordinate (b) at (2.5,2.2);
     \coordinate (c) at (0,1.6);
     \draw[thick,color=red]
     (a) to [out=-45,in=0]
     (c) to [out=0,in=225] (b);
     \draw (0,1) -- (0,2.5);
   \end{tikzpicture}

\end{document}

pdf vedhæftet

Jeg ville da mene at den burde give sammen hældning i begge ender.


-- 

/Lars Madsen
DK-TUG formand, tug.dk