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Is my calculation for finding the measure of the angle is right?

Is my calculation for finding the measure of the angle is right?-example-1
User Catwalk
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2 Answers

4 votes
Yes it is, as proof, if we subtract 9 from 109 and 89, we get 100 and 80, and if we add them up, we get 180, which is the angular value of a straight line
User Roland Buergi
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1 vote

Answer:

Yes

Explanation: