MNPQ Dreptunghi => MN = QP = b si MQ = NP = B
2b + 2B = 80
MQ = 3QP - 2 => B = 3b - 2
Acum inlocuim
2b + 2(3b-2) = 80
2b + 6b - 4 = 80
8b = 8+4
8b = 84
b = [tex]\frac{21}{4}[/tex] => B = [tex]\frac{63}{4}[/tex] - 2 => B = [tex]\frac{55}{4}[/tex] => MQ = [tex]\frac{55}{4}[/tex]
