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Sagot :

Bonsoir,

3) A = Arectangle + Arond + Apetitrectangle + Atriangle

Arond = (1/4) * pi * r² = 36pi = 36*3,14 = 113,04

Arectangle = 40*12 = 480

Apetitrectangle = 28*12 = 336

Atriangle = (40-28)*(24-12)/2 = 72

Donc A = 72 + 336 + 480 + 113,04 = 1 001,04

4) Produit en croix:

40 -> 368

x -> 138

donc x = (138*40)/368 = 5520/368 = 15

Il aura 15 euros

Bonne soirée

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