Question

Aflati baza mare a unui trapez care are linia mijlocie de 26 cm si baza mica o treime din baza mare

Answer 1

$l_m=\dfrac{B+b}{2}\Rightarrow 26=\dfrac{B+\dfrac{B}{3}}{2}\Rightarrow 52=\dfrac{4B}{3}\Rightarrow B=39\ cm$