Am nevoie de un raspuns cat mai repede!!
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Intr-un trapez dreptunghic cu diagonalele perpendiculare (trapez ortodiagonal) :
h = √ (B × b) = √ (9√6 × 6√6 ) = √324 = 18
A = (B+b) × h / 2 = (9√6 + 6√6) × 18 / 2 = 15√6 ×9 = 135√6 cm²