Răspunsuri

2014-11-19T15:04:23+02:00
L=2/3xL
P=50cm=2L+2l (pui bara si imparti la 2)
P=25cm=L+l
L+2/3L=25
Amplifici L si 25 cu 3 , dupa bara x 3
3L+2L=25
5L=25
L=5
L+l=25 ,atunci l = 20
A=Lxl=20x5=100cm patrati