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Algebra

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The sides of a square are one-third as long as the sides of an equilateral triangle. The difference between their perimeters is 20 centimeters. How long is each side of the triangle? Define your variables.

Thx

  • Algebra -

    let the sides of the square be x cm each.
    let the sides of the equilateral be 3x each
    3(3x) - 4x = 20
    5x = 20
    x = 4
    so the square is 4 by 4
    the triangle has sides 12 each.

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