bjr
aire du gris = 30x30 = 900 cm²
aire du grand carré = 50x50 = 2500 cm²
=> p = 900/2500 = 0,36
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bjr
aire du gris = 30x30 = 900 cm²
aire du grand carré = 50x50 = 2500 cm²
=> p = 900/2500 = 0,36