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+%%
+%% Ein Beispiel der DANTE-Edition
+%%
+%%
+%% Copyright (C) 2010 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{190.324pt}
+\setlength\parindent{0pt}
+\StartShownPreambleCommands
+\usepackage{pstricks,pst-eucl}
+\StopShownPreambleCommands
+\begin{document}
+\psset{unit=2cm}
+\pspicture(-2.5,-2)(2,2.5)
+\pstTriangle[linewidth=1pt](-2,-1){A}(1,2){B}(2,0){C}
+% les médiatrices
+{% encapsulation de modif paramètres
+ \psset{linestyle=none, PointSymbolB=none}
+ \pstMediatorAB[PointNameB={}]{A}{B}{K}{KP}\uput{50pt}[-45](KP){KP}
+ \pstMediatorAB[PointNameB={}]{C}{A}{J}{JP}\uput{-50pt}[100](JP){JP}
+ \pstMediatorAB[PosAngleA=75,PointNameB={}]{B}{C}{I}{IP}\uput{-5pt}[210](IP){IP}
+}% fin
+\pstInterLL[PointSymbol=square, PosAngle=-170]{I}{IP}{J}{JP}{O}
+{% encapsulation de modif paramètres
+ \psset{nodesep=-.8, linecolor=green}
+ \pstLineAB{O}{I}\pstLineAB{O}{J}\pstLineAB{O}{K}
+}% fin
+ \pstCircleOA[linecolor=red]{O}{A}
+% pour que le symbol de O soit sur et non sous les droites
+ \psdot[dotstyle=square](O)
+% les hauteurs et l'orthocentre
+ \pstProjection{B}{A}{C}{C'}
+ \pstProjection{B}{C}{A}{A'}
+ \pstProjection{A}{C}{B}{B'}
+ \psset{linecolor=blue}\ncline{A}{A'}\ncline{C}{C'}\ncline{B}{B'}
+ \pstInterLL[PointSymbol=square]{A}{A'}{B}{B'}{H}
+ % les médianes et le centre de gravité
+ \psset{linecolor=magenta}\ncline{A}{I}\ncline{C}{K}\ncline{B}{J}
+ \pstCGravABC[PointSymbol=square, PosAngle=95]{A}{B}{C}{G}
+\endpspicture
+\end{document}