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Sagot :

AZAXTRA

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

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