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

 Given, perimeter = 50 cm Perimeter of an isosceles triangle = sum of its all side $\Rightarrow$   Perimeter $=a+b+c$ $\Rightarrow$   $50=18+18+\text{ }Third\text{ }side$ $\Rightarrow$   $5036=\text{ }Third\text{ }side$ $\Rightarrow$   Third side = 14 cm.