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Math Help - Triangle Similarity

  1. #1
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    Triangle Similarity

    Two similar triangles. One area is 56 cm^2 and the other is 343 cm^2...on side of the first triangle is 8...whats the length of the corresponding side?
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  2. #2
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    Quote Originally Posted by stones44 View Post
    Two similar triangles. One area is 56 cm^2 and the other is 343 cm^2...on side of the first triangle is 8...whats the length of the corresponding side?
    In similar figurs the ratio of the areas is the square of the ratio of corresponding linear dimensions.

    Here the ratio of the areas is 56/343 and so if s is the unknown corresponding side of the second triangle:

    <br />
56/343 = (8/s)^2<br />

    RonL
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    so if my algebra is correct the answer is ~19.8 inches
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