How to find the perimeter of an acute / obtuse isosceles triangle

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Math › How to find the perimeter of an acute / obtuse isosceles triangle

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One side of an acute isosceles triangle is 15 feet. Another side is 5 feet. What is the perimeter of the triangle in feet?

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Explanation

Because this is an acute isosceles triangle, the third side must be the same as the longer of the sides that you were given. To find the perimeter, multiply the longer side by 2 and add the shorter side.

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