Exercices et devoirs de maths et physique-chimie sur mesure pour le collège et le lycée

Soit ABC un triangle.
Soit D un point de la droite (AB) et E un point de la droite (AC) tels que (BC) // (DE)

Démontrer \(\frac{AB}{AD} = \frac{AC}{AE}\).

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Pour accéder à cet exercice, il faut être connecté.