% graphe à 3 sommet


\begin{picture}(50,60)
	\put(8,15){\circle*{7}}
	\put(25,45){\circle*{7}}
	\put(42,15){\circle*{7}}
	\put(8,15){\line(3,5){17}}
	\put(25,45){\line(3,-5){17}}
	\put(8,15){\line(1,0){34}}
\end{picture}
