SOLUTION: A square and an equilateral triangle have the same perimeter. The side of the triangle is 3cm longer than the side of the square. How long is the side of the square?

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Question 304723: A square and an equilateral triangle have the same perimeter. The side of the triangle is 3cm longer than the side of the square. How long is the side of the square?
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
let length of side of square be x
length of side of triangle = x+3
perimeters of both are same
4x= 3(x+3)
4x=3x+9
x=9