\begin{exercice}%%%%ex 23
  Même consigne qu'à l'exercice \RefExercice{2G3_E_construire_somme}.
\begin{colenumerate}{3}
 \item $\vv{AB}+\vv{CD}$
 \item $\vv{BA}+\vv{EF}$
 \item $\vv{CD}+\vv{FE}$
\end{colenumerate}

   \begin{tikzpicture}[general]
\quadrillageSeyes{(0,0)}{(8,3.2)}
\foreach \x/\y/\N/\pos in {1.6/1.6/A/left,2.4/0.4/B/left,3.2/1/C/below,4.8/2.4/D/above,4.8/1.6/E/left,6.4/1.6/F/below}
{\pointGraphique{\x}{\y}{\N}{\pos}}
\end{tikzpicture}
\end{exercice}
