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2 May, 16:21

The side of a triangle with 3 equal sides is 7 inches shorter than the side of a square. The perimeter of the square is 39 inches more than the perimeter of the triangle. Find the length of a side of the square.

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  1. 2 May, 16:34
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    length of square = 18

    x = side of square

    x-7 = side of triangle

    3 (x-7) + 39 = 4x

    3x-21 + 39 = 4x

    3x+18 = 4x

    18=x

    square 18x4 = 72 (perimeter square)

    triangle side (18-7=11)

    11x3 = 33 (perimeter triangle)

    72-33=39
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