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J'arrive pas la C et D
TOUT COMMENTAIRE UNITILE SERAS SIGNALER.
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Aidez-moi (pièce jointe )
J'arrive pas la C et D
TOUT COMMENTAIRE UNITILE SERAS SIGNALER.
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a) AD = BE = CF = 6 cm
DF = AC = 3 cm
FE = CB = 4 cm
DE = AB = 5 cm
c) Aire laterale = (AC + CB + AB)xCF = 12x6 = 72 cm²
d) Aire totale = Aire laterale + 2xAire(ACB) = 72 + 2x(ACxCB/2) = 72 + 12 = 84 cm²