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Sagot :

bonjour,

Aire triangle:

(2*x)/2  = 2x/2 => xcm²

aire rectangle :

(7-x)* 2 = 14 -2x cm²

aire demi cercle :

(3,14 * 1² )/2 =1,57cm²

aire bleue

x +14 -2x -1,57 =

(x +12,43)cm²

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