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Math

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Right triangle ABC is similar to triangle XYZ. If the length of side AB is 30 inches, the length of side BC is 60 inches, and the length of side YZ is 10 inches, what is the length of side XY?

A.4
B.7
C.6
D.none of above

  • Math -

    use pythagorean theorem!
    a^2 + b^2 = c^2

  • Math -

    actually, use similar triangles.
    XY:AB = YZ:BC
    XY:30 = 10:60
    XY=5

    so, (D)

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