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Sagot :

Réponse :

1) A EBCF = AB*BC

A EBCF = (b)(c) = bc

2) A AEFD = AE*EF

A AEFD = a*c = ac

2) A ABCD = A AEFD +A EBFC = ac+bc

A ABCD = (AE+EB)*BC= (a+b)c= ac+bc

Explications étape par étape

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