Răspuns :
P = 86 cm
L = 33 cm
P = 2L + 2l
2 × 33 + 2l = 86
66 + 2l = 86
2l = 86 - 66
2l = 20
l = 20 : 2 = 10 cm
P = 2 × 33 + 2 × 10 = 86 cm
L = 33 cm
P = 2L + 2l
2 × 33 + 2l = 86
66 + 2l = 86
2l = 86 - 66
2l = 20
l = 20 : 2 = 10 cm
P = 2 × 33 + 2 × 10 = 86 cm