Question

Aflati aria unui dreptunghi ca are L(lungimea)=20 cm si latimea 1/2 din lungime
urgent!!!!!!!!!!!!!!

Answer 1

$L=20cm \\ l= \frac{1}{2}*L= \frac{1}{2}*20=10~(cm). \\ \\ A=L*l=10*20=200~(cm^{2}). \\ \\ \boxed{A=200~cm^2}$

Answer 2

L=20
l=L/2⇒l=20/2⇒l=10
A dreptunghiului= L*l= 20*20/2=20*10=200cm