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Question 22

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


Solution

Given, perimeter = 50 cm

Perimeter of an isosceles triangle = Sum of its all sides

Perimeter  = a + b + c

 50  = 18 + 18 + Third side

 50  = 36 + Third side

50 - 36 = Third side

14 = Third side

Third side  = 14 cm  

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