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:
Answer & explanation
Correct answer: option 2
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