Please help me with this question

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asked Nov 28, 2019 162k views

1 Answer

Eugene Berdnikov · Answer 1 · 2019-12-03T21:14:55+0000

All the triangles are similar, so you have ...
(short side)/(long side) = 3/(CD) = (CD)/12

Multiplying by 12(CD) gives
(CD)² = 3*12 = 36
CD = √36 = 6

The appropriate choice is ...
A) 6

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