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The scale factor for two similar triangles is 4 : 3. The perimeter of the smaller triangle is 12. What is the perimeter of the larger triangle?

  • Geometry -

    since perimiter is a linear measurement, the ratio of the perimeter equals the ratio of the sides

    if x is the larger perimeter,
    x/12 = 3/4
    4x = 36
    x = 9

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