Răspunsuri

2014-05-09T11:34:26+03:00
L=2l
Aria=l*L=128
l*2l=128
2l^2=128
l^2=64
l= radical din 64
l=8
L=2*6
L=16

Perim=l+l+L+L
Perim=8+8+16+16
Perim=48 mm
2014-05-09T13:07:41+03:00
L = 2l ⇒ A = L*l = 2l*l = 128 ⇒ l² = 128 : 2 ⇒ l² = 64 ⇒ l = √64 ⇒ l = 8 mm.
L = 2l ⇒ L = 2*8 = 16 mm.
P = 2(L+l) = 2 (16+8) = 2*24 = 48 ⇒ P = 48 mm.