slt
aire de ABC triangle rectangle = aire d'un demi rectangle
= AB x AC / 2
= (2√5 x 3√5) : 2 = (2x3x√5x√5) : 2 = 3 x √5 x√5 = 3 x 5 = 15
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slt
aire de ABC triangle rectangle = aire d'un demi rectangle
= AB x AC / 2
= (2√5 x 3√5) : 2 = (2x3x√5x√5) : 2 = 3 x √5 x√5 = 3 x 5 = 15