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Exercice: On considère le parallélépipède rectangle
suivant :
On donne les longueurs AB = 4 cm, BC = 3 cm
et AE = 5 cm.
Le point M est situé sur le segment [BF], et on appelle
x la longueur BM.
Le but est d'étudier la longueur du trajet L = EM+MC
en fonction de la position du point M.
Rectangle
1. Quelle est la nature du triangle EMF? du triangle MBC?