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vincentletiss
@vincentletiss
January 2021
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Bonjours je dois justifier chaque réponse
Merci d'avance
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JuliaKori
B) On est dans un cas où l'on peut utiliser Thalès d'où :
DC/DB = DA/DE = AC/BE
3/5 = DA/DC = 4,8/BE
Donc 3/5 = 4,8/BE d'où BE=(5*4,8)/3 = 8cm
c) Aire ABE = (AB*BE)/2 = (6,4*8)/2 = 25,6 cm²
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DC/DB = DA/DE = AC/BE
3/5 = DA/DC = 4,8/BE
Donc 3/5 = 4,8/BE d'où BE=(5*4,8)/3 = 8cm
c) Aire ABE = (AB*BE)/2 = (6,4*8)/2 = 25,6 cm²