\begin{tableau}[pr]{\linewidth}
  \\ \hline %%%%%%%%%%%%%%%%%%%%%%P57
 \begin{tikzpicture}[general, scale=1]
   \draw[fill=C4](0,0)--(2,0)--(1,1.5)--cycle;
   \draw (0,0) node[left]{$A$};
   \draw (2,0) node[right]{$B$};
   \draw (1,1.5) node[above]{$C$};
   \draw (0.5,0.75) node[color=A1, rotate=146.31]{\large $\approx$};
   \draw (1.5,0.75) node[color=A1, rotate=56.31]{\large $\approx$};
  \end{tikzpicture} &
  \propriete{}
 Si un triangle est isocèle alors ses angles à la base ont la même mesure.
&
Ici, $ABC$ est isocèle en $C$.

Donc $\widehat A=\widehat B$.
\end{tableau}
