On donne les figures suivantes :
\vspace{0,5cm}
\begin{center}\begin{pspicture}(6,2.5)
\psframe(6,2.5)
\psline{<->}(0,2.6)(6,2.6) \uput[u](3,2.6){$x$ cm}
\psline{<->}(6.1,0)(6.1,2.5) \rput{90}(6.3,1.25){4cm}
\uput[ul](0,2.6){A} \uput[ur](6,2.5){B}
\uput[dr](6,0){C} \uput[dl](0,0){D}
\end{pspicture}\end{center}
\vspace{0,5cm}
\begin{center}\begin{pspicture}(9,2.5)
 \psframe(6,2.5) \psline(6,2.5)(9,0)(6,0)
 \psline{<->}(-0.1,0)(-0.1,2.5) \rput{90}(-0.3,1.25){2 cm}
 \psline{<->}(0,-0.1)(6,-0.1) \uput[d](3,-0.1){$x$ cm}
 \psline{<->}(6,-0.1)(9,-0.1) \uput[d](7.5,-0.1){3 cm}
 \uput[ul](0,2.6){E} \uput[ur](6,2.5){F}
 \uput[dl](0,0){H}  \uput[dr](9,0){G}
\end{pspicture}\end{center}