%@Auteur: François Meria\par \vskip 1cm \begin{center} \psset{unit=1.25} \pspicture(-3.3,-1)(5.5,5.5) \pstGeonode[PointSymbol=+,PosAngle=-135](0,0){A} \pstGeonode[PointSymbol=+,PosAngle=-45](5,0){B} \pstGeonode[PointSymbol=+,PosAngle=180](-2,3){C} \pstGeonode[PointSymbol=+,PosAngle=90](5,5){D} \pspolygon(0,0)(5,0)(5,5)(-2,3) \pstCurvAbsNode[PointSymbol=none,PointName=none]{A}{C}{m_1}{\pstDistVal{1.8}} \pstCurvAbsNode[PointSymbol=none,PointName=none]{A}{C}{m_2}{\pstDistVal{-1.5}} \pstArcOAB{A}{m_2}{m_1} \pstCurvAbsNode[PointSymbol=none,PointName=none]{A}{C}{t}{\pstDistVal{1.25}} \pstLineAB[arrows=<->]{t}{A} \mput*{4~cm} \pstCurvAbsNode[PointSymbol=none,PointName=none]{D}{C}{n_1}{\pstDistVal{-2}} \pstCurvAbsNode[PointSymbol=none,PointName=none]{D}{C}{n_2}{\pstDistVal{1.5}} \pstArcOAB{D}{n_1}{n_2} \pstCurvAbsNode[PointSymbol=none,PointName=none]{D}{C}{p}{\pstDistVal{-1.75}} \pstLineAB[arrows=<->]{p}{D} \mput*{7~cm} \pcline{<->}(0,-0.5)(5,-0.5) \lput*{:U}{5~cm} \pstRightAngle{A}{B}{D} \psset{linewidth=0.3mm} \pstLineAB{A}{C} \pstLineAB{C}{D} \pstSegmentMark[SegmentSymbol=pstslashh]{B}{D} \pstSegmentMark[SegmentSymbol=pstslashh]{A}{B} \endpspicture \end{center} \vskip 1cm \centerline{\textbf{CONSIGNES}} \vskip 1cm \begin{myenumerate} \item \'Ecrire un énoncé de construction, le plus court possible, de la figure ci-dessus. \item Reproduire la figure ci-dessus étape par étape, en commençant par tracer le segment $[AB]$. \end{myenumerate}