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To find the perimeters of a triangle you add the three sides together. if you get one of the two congruent sides you know the other congruent side. Then you use the pathagrium theorem to find the last side and add them up.

Pathagrium theorem= a square + b square = c square where c is the hypotenuse

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Q: Find the perimeter of an isosceles triangle?
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Related questions

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If you mean "isosceles" triangle, the perimeter is the sum of twice the known side plus the base.


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