%% 
%%  Ein Beispiel der DANTE-Edition
%%  
%%  7. Auflage
%% 
%%  Beispiel 35-00-25 auf Seite 828.
%% 
%%  Copyright (C) 2016 Herbert Voss
%% 
%%  It may be distributed and/or modified under the conditions
%%  of the LaTeX Project Public License, either version 1.3
%%  of this license or (at your option) any later version.
%% 
%%  See http://www.latex-project.org/lppl.txt for details.
%% 
%% 
%% ==== 
% Show page(s) 1
%% 
%% 
\documentclass[]{exaarticle}
\pagestyle{empty}
\setlength\textwidth{352.81416pt}
\setlength\parindent{0pt}
%StartShownPreambleCommands
\usepackage{pst-eucl}
%StopShownPreambleCommands
\begin{document}
\begin{pspicture}(-3,-3)(3,3)
\pstTriangle[PosAngle={180,0,90}](-3,0){A}(3,0){B}(0,3){C}
\pstCircleOA{I}{A}
\pstMiddleAB{A}{B}{Iab}
\pscustom[linestyle=none,fillstyle=solid,fillcolor=blue!50]{%
 \psarcAB(C)(A)(B)
 \psarcnAB(Iab)(B)(A)}
\pstMiddleAB{A}{C}{Iac}
\pscustom[linestyle=none,fillstyle=solid,fillcolor=red!50]{%
 \psarcnAB(I)(A)(C)
 \psarcAB(Iac)(C)(A)}
\pstMiddleAB{B}{C}{Ibc}
\pscustom[linestyle=none,fillstyle=solid,fillcolor=green!50]{%
 \psarcAB(I)(B)(C)
 \psarcnAB(Ibc)(C)(B)}
\end{pspicture}
\end{document}