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Sagot :

Bonjour,

A = x

B= x/2

Périmètre:

x+x/2 + x+ +x/2  +x +x +x+x  +3x  =9x + 2x/2 =

9x+x = 10x

aires

4(x*x) + (x*x/2) = 4x² + x²/2

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