December 2018 0 291 Report

Trapezul dreptunghic ABCD (AB ΙΙ CD ,m(<A)=m(<D)=90)are AB=8 cm ,CDE=20 cm ,iar aria triunghiului BEC este egala cu 54 cm ,unde BE perpendicular DC , E ∈ (DC).
a.Determinati lungimea segmentului [BE]
b.Calculati aria trapezului ABCD.
c.Calculati aria triunghiului BAC.
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