The perimeter of an isosceles triangle is 90 cm. If the case is 26 cm, then find the length of the equal sides.

30 cm 40 cm 42 cm 32 cm

32 cm

The perimeter of an isosceles triangle = 90 cm. Base = 26 cm We know that, P = (2a + b) Where, p = perimeter a = side and b = another side Let the length of the equal sides be m P = (2a + b) = 90 = 2m + 26 = (90 – 26) = 2m = 64 = 2m = m = 32