Question

Calculati perimetrul unui dreptunghi stiind ca:
a) are aria 50m$50 m ^{2}$ si lungimea  10 m
b) are aria 25,2 $m^{2}$ si latimea 28 dm

Answer 1

a) A=Lxl
50=10xl⇒l=50/10=5 m
P=2(L+l)=2(10+5)=30 m

b) A=Lxl
22.5=Lx2.8⇒L=22.5/2.8=8.03 m
P=2(L+l)=2(8,03+2,8)=21,66 m