SOLUTION: The first angle of a triangle is 17° and the second angle is 34° what is the third angle

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Question 629266: The first angle of a triangle is 17° and the second angle is 34° what is the third angle
Answer by Tatiana_Stebko(1539) About Me  (Show Source):
You can put this solution on YOUR website!
The angles of a triangle always sum to 180°
Therefore the third angle of a triangle is 180°-(17°+34°)=129°