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

Monjur Alahi

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


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Salim Ahmed Kawsar

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The third side is 14 cm.

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Salim Ahmed Kawsar

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We know the, isosceles triangle contains two equal sides.

From the question it is given that, one of the two equal sides is 18cm.

And Perimeter of an isosceles triangle is 50cm

We know that, perimeter of isosceles triangle = sum of all sides

Let us assume the third side be x.

Then,

50 = 18 + 18 + x

50 = 36 + x

x = 50 – 36

x = 14 cm

Therefore, length of third side of isosceles triangle is 14 cm.

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