%% 
%%  A DANTE-Edition example
%% 
%%  Example 29-02-6 on page 567.
%% 
%%  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{153.70511pt}
\setlength\parindent{0pt}

\usepackage{pst-eucl}

\begin{document}
\begin{pspicture}(-1,-1)(2.5,2)
 \pstGeonode[PosAngle={-45,45,135,-90},
   PointSymbol=none]{A}(0,2){B}(2.5,2){C}(2.5,0){D}
 \pspolygon(A)(B)(C)(D)
 \psset{RightAngleType=german,arrows=->}
 \pstRightAngle{D}{A}{B}
 \pstRightAngle[RightAngleSize=1]{B}{A}{D}
 \pstRightAngle[linestyle=dotted]{B}{C}{D}
 \psset{arrowscale=2}
 \pstRightAngle[RightAngleSize=-0.75]{A}{B}{C}
 \pstRightAngle[RightAngleSize=0.75]{C}{D}{A}
\end{pspicture}
\end{document}
