Question

Two sides of a triangle are 12 cm and 14 cm. The perimeter of the triangle is 36 cm. What is the length of third side

Answer 1

Given two sides of the triangle are 12 cm and 14 cm

the perimeter of triangle = 36 cm

Let the length of the third side $=a$ cm

the perimeter of triangle = sum of the length of sides of the triangle.

According to the problem,

$12+14+a=36$

$\Rightarrow 26+a=36$

$\Rightarrow a=36-26$

$\Rightarrow a=10$

$\therefore$ length of the third side of triangle = 10 cm