Exercice 40

\(\overline{AB} \perp \overline{BC}\)

\(\overline{ED} \parallel \overline{BC}\) et \(\overline{DF} \parallel \overline{AB}\)

\(\overline{AC} = 39\), \(\overline{AB} = 15\), \(\dfrac{\overline{EF}}{\overline{AC}} = \dfrac{1}{3}\)

Calculer le périmètre du triangle \(EDF\).

Réponse

\(P = 30\,\text{cm}\)