\begin{exercice*}\label{2G3_E_construire_somme}
 \ExerciceRefMethode{2G3_M_construire_somme}
 \begin{enumerate}
 \item Reproduire la figure ci-dessous.
 \item Construire les vecteurs suivants.
\begin{colenumerate}{3}
 \item $\vv w+\vv r$
 \item $\vv r+\vv v$
 \item $\vv v+\vv w$
\end{colenumerate}
 \end{enumerate}

   \begin{tikzpicture}[general]
\quadrillageSeyes{(0,0)}{(8,3.2)}
\draw[color=C1, ->, epais] (4,1.6)--(4.8,3.2);
\draw[color=C1] (4.4,2.4) node[above left] {{\boldmath $\vv v$}};
\draw[color=C1, ->, epais] (4,1.6)--(2.4,0);
\draw[color=C1] (3.6,0.8) node[below left] {{\boldmath $\vv w$}};
 \draw[color=C1, ->, epais] (4,1.6)--(5.6,1.6);
 \draw[color=C1] (4.8,1.6) node[above left] {{\boldmath $\vv r$}};
\end{tikzpicture}
\begin{corrige}
~\\
 \begin{tikzpicture}[general]
\quadrillageSeyes{(2,0)}{(7,3.2)}
\draw[color=C1, ->, epais] (4,1.6)--(4.8,3.2);
\draw[color=C1] (4.4,2.4) node[above left] {{\boldmath $\vv v$}};
\draw[color=C1, ->, epais] (4,1.6)--(2.4,0);
\draw[color=C1] (3.6,0.8) node[below left] {{\boldmath $\vv w$}};
 \draw[color=C1, ->, epais] (4,1.6)--(5.6,1.6);
 \draw[color=C1] (5.1,1.6) node[above left] {{\boldmath $\vv r$}};
 \draw[color=C1, ->, epais] (4,1.6)--(5.6,1.6);
 \draw[color=A1, ->, epais] (4,1.6)--(4,0);
 \draw[color=A1] (5.2,0.4) node[left] {{\boldmath $\vv w+\vv r$}};
 \draw[color=A1, ->, epais] (4,1.6)--(6.4,3.2);
 \draw[color=A1] (6.8,2.6) node[left] {{\boldmath $\vv r+\vv v$}};
 \draw[color=A1, ->, epais] (4,1.6)--(3.2,1.6);
 \draw[color=A1] (3.8,1.9) node[left] {{\boldmath $\vv v+\vv w$}};
\end{tikzpicture}

\end{corrige}
\end{exercice*}
   
