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May I please get help with part a? I have tried multiple ways to find the answers but still could not get the correct answers

May I please get help with part a? I have tried multiple ways to find the answers-example-1
User PoorLuzer
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1 Answer

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Use the fact that the sum of the three angles of any triangle is equal to 180 degrees.

Consider triangle ABC.


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User Kmecpp
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