%% 
%%  A DANTE-Edition example
%% 
%%  Example 29-02-11 on page 570.
%% 
%%  Copyright (C) 2011 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[]{article}
\pagestyle{empty}
\setlength\textwidth{201.70511pt}
\setlength\parindent{0pt}

\usepackage{pst-eucl}

\begin{document}
\begin{pspicture}(-2,-2)(2,2)
  \pstGeonode[PosAngle={20,90,0}]%
    {O}(-.6,1.5){A}(1.6,-.5){B}
  \pstSymO[CodeFigColor=blue,
    PosAngle={-90,180}]{O}{A, B}[C]
  \pspolygon[linewidth=1pt](A)(B)(C)(B')
  \pstLineAB[linestyle=dashed]{<->}{A}{C}
  \pstLineAB[linestyle=dashed]{<->}{B}{B'}
\end{pspicture}
\end{document}