Calculer \(\overline{B'C'}\) et \(\overline{CC'}\).
Les segments \(\overline{AA'}\), \(\overline{BB'}\) et \(\overline{CC'}\) sont parallèles.
Données : - \(\overline{AB} = 4\) - \(\overline{BC} = 5\) - \(\overline{AA'} = 12\) - \(\overline{BB'} = 16\) - \(\overline{A'B'} = 5\)
\[ \begin{aligned} A &= 6,25\,\text{cm}, \\ B &= 21\,\text{cm}. \end{aligned} \]