Question

Triangle ADC is similar to triangle AEB. Find y.
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Answer 1

y = 15

Explanation:

Corresponding sides of similar triangles are in proportion. It is convenient to set up the proportion so the unknown value is in the numerator.

AD/ED = AC/BC

y/6 = 20/8 = 5/2

y = 6×5/2 . . . . multiply by 6

y = 15