The perimeter of an isosceles triangle is 28 cm. The unequal side is 10 cm. Find the length of each equal side.

Given :

The perimeter of an isosceles triangle $=28 cm$.

The length of unequal side $= 10 cm$.

To find :

We have to find the length of each equal side.

Solution :

Let the length of each equal side be x.

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

So, Perimeter$= x+x+10$

           $28 = x+x+10$

         $28 = 2x+10$

          $2x = 28-10$

          $2x =18$

         $x = \frac{18}{2} = 9$

Therefore, the length of each equal side is 9 cm. 

 

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Updated on: 10-Oct-2022

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