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Sagot :

Partant par la gauche:

2*2 = 4 cm²

(2*1) / 2 = 1 cm²

2.5 cm²

(1² * 3.14) / 2 = 1.57

On additionne:

4 + 1 + 2.5 + 1.57 = 9.07 cm²

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