nicole17551 nicole17551

11-10-2019
Mathematics

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Please help. I will mark brainliest

Please help I will mark brainliest class=

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InLoveWithPugs InLoveWithPugs

12-10-2019

Answer:

Step-by-step explanation:

D. 123°

The sum of the entire interior of the triangle is 180°

A straight line is 180° as well.

Let's say that the unlabeled angle is x.

63° + 60° = 123°

180° - 123° = 57°

x = 57°

x + ∠1 = 180°

57° + ∠1 = 180°

180° - 57° = 123°

D. 123°

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