SOLUTION: Two sides of a triangle have the same length. The third side measures 2 m less than twice the common length. The perimeter of the triangle is 18 m. What are the lengths of the thre

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Question 272633: Two sides of a triangle have the same length. The third side measures 2 m less than twice the common length. The perimeter of the triangle is 18 m. What are the lengths of the three sides?
Answer by mananth(16946) About Me  (Show Source):
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Two sides of a triangle have the same length. The third side measures 2 m less than twice the common length. The perimeter of the triangle is 18 m. What are the lengths of the three sides?
Let the equal length sides be x
Third side measures 2 m less than twice the common length
2x-2
x+x+2x-2=18
4x-2=18
4x=20
x=20/4
x=5 meters
The third side will be 8. Since the perimeter is 18
5+5+8 =18