%% 
%%  Ein Beispiel der DANTE-Edition
%%  
%%  7. Auflage
%% 
%%  Beispiel 28-02-26 auf Seite 619.
%% 
%%  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
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\documentclass[]{exaarticle}
\pagestyle{empty}
\setlength\textwidth{193.16928pt}
\setlength\parindent{0pt}
%StartShownPreambleCommands
\usepackage{pst-eucl}
%StopShownPreambleCommands
\begin{document}
\begin{pspicture}(-2,-2)(2,2)
  \pstGeonode[PosAngle={0,-110}]{O}(0,1.5){A}
  \pstCircleOA[linecolor=red]{O}{A}
  \pstGeonode(0,2){B}(2,-2){C} \pstLineAB{B}{C}
  \pstInterLC[PosAngle=-80]{B}{C}{O}{A}{D}{E}
  \pspolygon*[linecolor=black!10,linewidth=0.75pt](O)(D)(E)
\end{pspicture}
\end{document}
