bonjour
selon le th de Pythagore
AD² = 2 ² + 3 ² = 4 + 9 = 13
AD = √13 ≅ 3.6 cm
P = 2 + 3 + 3.6 ≅ 8.6 cm
A = ( 2 x 3 ) /2 = 3 cm²
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bonjour
selon le th de Pythagore
AD² = 2 ² + 3 ² = 4 + 9 = 13
AD = √13 ≅ 3.6 cm
P = 2 + 3 + 3.6 ≅ 8.6 cm
A = ( 2 x 3 ) /2 = 3 cm²