%% 
%%  Ein Beispiel der DANTE-Edition
%%  
%%  7. Auflage
%% 
%%  Beispiel 28-01-18 auf Seite 598.
%% 
%%  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{169.16928pt}
\setlength\parindent{0pt}
%StartShownPreambleCommands
\usepackage{pst-eucl}
%StopShownPreambleCommands
\begin{document}
\begin{pspicture}(-1.5,-1.5)(1.5,1.5)
  \psset{linecolor=black,CodeFig=true}
  \pstGeonode[PosAngle=45](-1.25,-1.25){A}%
    (-1.25,1.25){B}(1.25,1.25){C}(1.25,-1.25){D}
  \pstLineAB{A}{B} \pstLineAB{B}{C}
  \pstLineAB{C}{D} \pstLineAB{D}{A}
  \pstRightAngle{A}{B}{C}
  \pstRightAngle[RightAngleSize=1]{B}{C}{D}
  \pstRightAngle[RightAngleType=german]{C}{D}{A}
  \pstRightAngle[RightAngleType=german,
    RightAngleSize=.75]{D}{A}{B}
\end{pspicture}
\end{document}
