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123°
Trianle Exterior angle theorem
PeaceRose:
There's two answers to the second one
The answer is 123 because it close
Triangle angle sum theorem only fits here as another theorem. Others are not.
I have given the solution
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123°
Trianle Exterior angle theorem and you can user triangle angle sum theoram to find 180-angle 1. From which you can get angle 1
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