The perimeter of an isosceles triangle is 220 cm. If the base is 40 cm, then the length of each of the other sides is:

85 cm 90 cm 80 cm 95 cm

90 cm

We know that, Perimeter of an isosceles triangle = 2x + y, where, x = length of equal sides The perimeter of an isosceles triangle = 220 cm Base = y = 40 cm = 220 = 2x + 40 = 2x = 180 = x = 90 cm