June 2021 0 108 Report
Exercice 3 : ABCD est rectangle tel que AB= 25 cm, et BC= 12 cm. E est un point du côté [AB] et DE = 20 cm.

1) Calculer la longueur AE puis la longueur CE. Justifier.
2) Le triangle ECD est-il rectangle? Justifier.
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