%% 
%%  A DANTE-Edition example
%% 
%%  Example 29-02-12 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{129.70511pt}
\setlength\parindent{0pt}

\usepackage{pst-eucl}

\begin{document}
\psset{unit=.5}%
\begin{pspicture}(0,-2)(8,7)
  \pstTriangle(1,3){B}(5,5){C}(4,1){A}
  \pstOrtSym{A}{B}{C}[D]  \psset{CodeFig=true}
  \pstOrtSym[CodeFigColor=red]{C}{B}{A}
  \pstOrtSym[SegmentSymbol=pstslash,dotsep=3mm,
    linestyle=dotted,CodeFigColor=blue]{C}{A}{B}
  \pspolygon[linestyle=dotted,linewidth=1pt](A')(B')(D)
\end{pspicture}
\end{document}