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un trapez are h= 6 iar linia mijl. = 10 .......Aria =?

Răspuns :

Aria=hxl.m.
Aria=6x10
Aria-60cm²
[tex]A= \frac{(B+b)*h}{2}=10*6=60 cm² \\ l.m= \frac{B+b}{2} [/tex]