Question

Un trapez are linia mijlocie de 15 cm. Suma lungimilor bazelor este egala cu ...... ?

Answer 1

ABCD TRAPEZ OARECARE MN linie mijlocie , conform formulei 
        l=(a+b)/2    unde  l-linie mijlocie   a-baza mica     b-baza mare
a+b=15*2=30 cm

Answer 2

[tex]ABCD ~trapez~oarecare.MN~ linia~mijlocie~conform~formulei.\\\\ \boxed{l= \frac{a+b}{2}} ~~~unde~\boxed{l->ilinea~mijlocie}~~~si ~~~\boxed{a->baza~mica}~~~si \\\\\boxed{b->baza~mare}.\\\\\boxed{a+b=15*2=30}. [/tex]