SOLUTION: a triangle has two equal sides,and the third side of the triangle is 5 feet shorter than the first side. if the perimeter of the triangle is 40 feet, find the dimension of each sid

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Question 356682: a triangle has two equal sides,and the third side of the triangle is 5 feet shorter than the first side. if the perimeter of the triangle is 40 feet, find the dimension of each side.
Answer by robertb(5830) About Me  (Show Source):
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The lengths of the sides of the triangle would be x, x, x - 5. The perimeter would be x+x+x-5 = 40, 3x = 45, x = 15. Therefore the lengths of the sides of the triangle are 15, 15, 10.