Each of the 2 equal sides of an isosceles triangle is twice as large as the third side. If the perimeter of the triangle is 30 cm,

Monjur Alahi

Each of the 2 equal sides of an isosceles triangle is twice as large as the third side. If the perimeter of the triangle is 30 cm, find the length of each side of the triangle.


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Salim Ahmed Kawsar

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Correct answer is 6 cm, 12 cm, 12 cm

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Salim Ahmed Kawsar

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Let length of equal sides of an isosceles triangle be 2x cm.

So, the third side of triangle x cm

Perimeter of triangle = 30 cm

⇒ x + 2x + 2x = 30

⇒ 5x = 30

⇒ x = 30/5 = 6

Thus, 6 cm, 12 cm and 12 cm are the required sides of the triangle.

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