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

Given :

The perimeter of an isosceles triangle $=50 cm$.

The length of each equal side $= 18 cm$.

To find :

We have to find the length of the third side.

Solution :

Let the length of the third side be $x$.

The perimeter of a triangle is the sum of all the sides of the triangle.

Therefore,

Perimeter$= 18+18+x$

$\Rightarrow x+36=50$

$\Rightarrow x=50-36$

$\Rightarrow x=14\ cm$

Therefore, the length of the third side is $14\ cm$.

Tutorialspoint

Simply Easy Learning

Updated on: 10-Oct-2022

94 Views

Kickstart Your Career

Get certified by completing the course

Get Started