\begin{tableau}[pr]{\linewidth}
  \\ \hline %%%%%%%%%%%%%%%%%%%%%%P59
\begin{tikzpicture}[general, xscale=0.5, yscale=0.4]
 \draw[color=J1, fill=J1] (2,0.5)--(3,0) arc (-30:11.5:1.118)--(2,0.5)--(1,1) arc (150:191.5:1.118)--cycle;
 \draw (-1,-0.25)--(5,1.25); 
 \draw (-1,2)--(5,-1);
 \draw (2,0.5) node[above] {$A$};
 \draw (-1,-0.25) node[above] {$x$}; 
 \draw (-1,2) node[above] {$z$};
 \draw (5,1.25) node[above] {$y$}; 
 \draw (5,-1) node[above] {$t$};
\end{tikzpicture} &
  \propriete{}
 Si deux angles sont opposés par le sommet alors ils ont la même mesure.
&
Ici, $\widehat{xAz}$ et $\widehat{yAt}$ sont opposés par le sommet.

Donc, $\widehat{xAz}=\widehat{yAt}$.
\end{tableau}
