Question

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

Answer 1

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

the perimeter of triangle $=36cm$

Let the length of the third side $=acm$

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

Accoreding to problem,

$12+14+a=36$

$\Rightarrow 26+a=36$

$\Rightarrow a=36-26$

$\Rightarrow a=10$

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