\begin{tableau}[pr]{\linewidth}
  \\ \hline %%%%%%%%%%%%%%%%%%%%%%P50
 \begin{tikzpicture}[general, xscale=0.5, yscale=0.6]
 %\clip (0,-0.5)rectangle (6,3);
  \draw (0,-0.75)--(5,3.25);
  \draw (0,2.5)--(6,-0.5);
  \draw (2.5,1.25) node[right] {$E$};
  \draw (5,0) node[below left] {$F$};
  \draw (0.75,0) node[below right] {$G$};
  \draw (1,2) node[above] {$H$};
  \draw (3.25,2) node[above] {$K$};
  \draw[very thick, color=H1] (0,0)--(6,0);
  \draw[very thick, color=H1] (0,2)--(6,2);
 \end{tikzpicture} &
  \propriete{}
{\bfseries Théorème de Thalès}:\par
Si $M\in(AB)$,  $N\in(BC)$ et  $(BC)//(MN)$ 

alors $\dfrac{\TopStrut AB}{\BotStrut AM}=\dfrac{AC}{AN}=\dfrac{BC}{MN}$.
&
Ici, $H\in(EF)$,  $K\in(EG)$ et  $(HK)//(GF)$.

Donc $\dfrac{\TopStrut EF}{\BotStrut EH}=\dfrac{EG}{EK}=\dfrac{GF}{HK}$.
\end{tableau}
