\begin{tableau}[pr]{\linewidth}
\hline  \hline %%%%%%%%%%%%%%%%%%%%%%P7
\begin{tikzpicture}[general, scale=0.5]
 \draw[very thick, color=A2] (0,0)--(3,2);
 \draw[very thick, color=A2] (1,0)--(4,2);
 \draw[very thick, color=B1, loosely dashed] (1,0)--(4,2);
 \draw[very thick, color=B1] (4,0)--(7,2);
 \draw (3,2) node[above left] {$(d_1)$};
 \draw (4,2) node[above] {$(d_2)$};
 \draw (4,0) node[below right] {$(d_3)$};
\end{tikzpicture}
 &
  \propriete{}  Si deux droites sont parallèles alors toute droite parallèle à l'une est parallèle à l'autre. &
  Ici,   $(d_1)//(d_2)$ et $(d_2)//(d_3)$.  Donc   $(d_1)//(d_3)$.
\end{tableau}
