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Sagot :

Bonjour,

aire trapèze:

[(Base + base) * h]/2

[(48 + 27)* DH]/2

DH?

DC² = HC² + DH²

HC = 48 -27 =21

DC² - HC² = DH²

75² - 21² = 5625 - 441 = 5184

DH² = 5 184

DH =√5 184 =72

[(48 + 27)*72]/2 =>2 700m² =  21 ares

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