Răspuns :
712- 2x89=
712- 178= 534
L=534:2
L= 267
V: P=2x(L+l)
P=2x(267+89)
P=2x 356
P= 71 2
R: L=267 m
712- 178= 534
L=534:2
L= 267
V: P=2x(L+l)
P=2x(267+89)
P=2x 356
P= 71 2
R: L=267 m
2 l+2 L=712 2 l = 89+89 =178 712-178=534 534:2=267 L= 267 VERIFIC 267+267+89+89= 712