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One side of a triangle is one-third the longest side. The third side is 13 feet less than the longest side. The perimeter is 85. Find all three sides.

 Feb 11, 2021
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One side of a triangle is one-third of the longest side. The third side is 13 feet less than the longest side. The perimeter is 85. Find all three sides.

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"one side" = x          "long side" = 3x           "third side" = 3x - 13

 

x + 3x + 3x - 13 = 85

 

x = 14

 

sides of a triangle are  14,  42, and 29

 Feb 11, 2021

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