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trapezul dreptunghic ABCD(AB||CD,m(A)=m(D)=90°) AB=8cm DC=20cm A BEC=54cm² BEperpendicular pe DC,E apartine (DC)
a) [BE]=?
b) aria ABCD=?
c) aria BAC=?
Va rooog dau corana pt rezolvarea corecta