math

posted by Semra

The perimeter of a square piece of land is twice the perimeter of an equilateral triangle. (an equilateral triangle has three equal sides.) If one side of the square is 45 feet, find the length of the sides of the triangle.

2x + 3 = 45
2 x + 3 -3 = 45 + 2x
2x + 45
___ __ = x
2 2

x +22= x

x = 22

  1. Steve

    Not quite sure what you're doing there.

    If a side of the square is 45, its perimeter is 180.

    Thus, the perimeter of the triangle is 90.
    So, each side of the triangle must be 30.

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