Trouver la mesure de l'angle $\widehat{CAB}$ au degré près:
\vspace*{-5mm}
\begin{center}
\begin{tikzpicture}[scale=0.7]
\draw (0,0) node[below left] {A} -- (4.5,0) node[below right] {B} -- (9.5,3.6) node[above] {C} -- cycle;
\draw[shift={(-2,-0.75)},thick,numpageenonce] (9.5,3.6) arc (210:226:2);
\node[numpageenonce] at (7.2,2.3) {$15^\circ$};
\end{tikzpicture}
\end{center}
\vspace*{-5mm}

