The lengths of two sides of an isosceles triangle are 9 cm and 20 cm. – InterviewSolution

1.

The lengths of two sides of an isosceles triangle are 9 cm and 20 cm. What is the perimeter of the triangle? Give reason.

Answer»

Third side must be 20 cm, because sum of two sides should be greater than the third side.

∴ Perimeter of the triangle

= Sum of all sides

= (9 + 20 + 20) cm

= 49 cm

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