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2 January, 08:56

Given:angle 1 = angle 2

If AC:BC = 3:5 and AB = 12, find DB.

A. 1.5

B. 4.5

C. 7.5

D. 12

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Answers (1)
  1. 2 January, 10:05
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    Let DB be x, then AD = 12 - x

    By the simillarity of triangles,

    3/5 = (12 - x) / x

    3x = 5 (12 - x) = 60 - 5x

    8x = 60

    x = 60/8 = 7.5

    Therefore, DB = 7.5
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