 	\begin{exercice}
 	 Voici un axe gradué $(OI)$. 
 	 
 	 Calculer les distances : $AB$; $AC$; $BD$ et $DC$.
 	 \begin{center}
 	  \begin{tikzpicture}[general, scale=0.8]
 	   \axeX{-4}{5}{-3,-1,0,1,2,4}
 	   \foreach \x/\N in {-3/D,-1/C,0/O,1/I, 2/A,4/B}{ \draw (\x,0) node[above]{$\N$}; }
 	  \end{tikzpicture}
 	 \end{center}
\begin{corrige}
 \begin{colitemize}{2}
  \item $AB=2$ \item $AC=3$ \item $BD=7$ \item $DC=2$
 \end{colitemize}
\end{corrige}
 	\end{exercice}
