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Find the missing side length labeled with a ? mark.

Find the missing side length labeled with a ? mark.-example-1

1 Answer

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Answer: 10

Step-by-step explanation:

Since the lines are parallel, the triangles are congruent. This means their side lengths are an equal ratio!

6 + 6 : 20 = 6 : ?

12:20 = 6:?

12:20 = 6:10

Answer is 10

User Scott Warchal
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