Exercice 1: On considère la figure ci-contre tel que: (BC) // (MN) AB= 16 BM = 4; MN = 3 NC et CB. AC = 8: 1)- Calculer les distances: 2)- Sachant que : AE = 4 et AF = 2 montrer que: (BC) // (EF). 3)- Calculer la distance: EF N​