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Dhruv Jagetiya · Answer 1 · 2022-06-19T19:47:57+0000

Answer:

Since a triangle has 180 interior degrees, and 81+57=138, and 180-138=42, you need to find _*2+18=42. (Hint, you can subtract the 18 from the 42, and find _*2=24).

Explanation:

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