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math

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A triangle whose sides are 5,12, and 13 inches is similar to a traingle whose longest side is 39 inches. What is the perimeter of the larger triangle?

  • math -

    the perimeter of two similar triangles is proportional to the ratio of their sides

    ratio of sides = 13:39 = 1:3

    the perimeter of the smaller is 30
    so the perimeter of the larger is 90.

  • math -

    32

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