Question

Question 22

Perimeter of an isosceles triangle is 50 cm. If one of the two equal sides is 18 cm, find the third side.

Answer 1

Given, perimeter = 50 cm

$\therefore$ Perimeter of an isosceles triangle = Sum of its all sides

$\Rightarrow$ Perimeter = a + b + c

$\Rightarrow$ 50 = 18 + 18 + Third side

$\Rightarrow$ 50 = 36 + Third side

$\Rightarrow$ 50 - 36 = Third side

$\Rightarrow$ 14 = Third side

$\therefore$ Third side = 14 cm