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I dont understand how to do this problem. Someone please assist me

I dont understand how to do this problem. Someone please assist me-example-1
User AkkeyLab
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1 Answer

9 votes
9 votes

Answer:

The unknown length = 12 units.

Explanation:

The small and large triangles are similar because of the parallel lines.

So

6 / (6+4) = x / 20

10x = 120

x = 12.

User XUE Can
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