\begin{exercice}Même consigne qu'à l'exercice \RefExercice{2G1_base_respecterproportion}.
%Dessiner en perspective cavalière

    \begin{center}
\begin{tikzpicture}[general,scale=0.9]
\draw [quadrillage, xstep=1.0cm,ystep=1.0cm]
(1.5,-0.5) grid (6.5,4.5);
%\clip(1.3,-0.5) rectangle (6.8,4.74);
\draw  (2,3)-- (5,3);
\draw  (5,3)-- (5,0);
\draw  (5,0)-- (2,0);
\draw  (2,0)-- (2,3);
\draw  (2,3)-- (3,4);
\draw  (5,3)-- (6,4);
\draw  (6,4)-- (3,4);
\draw  (6,1)-- (5,0);
\draw [ dashed] (3,4)-- (3,1);
\draw [ dashed] (3,1)-- (6,1);
\draw  (6,4)-- (6,1);
\draw [ dashed] (3,1)-- (2,0);
\end{tikzpicture}
    \end{center} 
\end{exercice}


