SOLUTION: If a triangle has angles of 50° and 120°, what is the third angle? How do you know?

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Question 575823: If a triangle has angles of 50° and 120°, what is the third angle? How do you know?
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
The third angle is 180 - (50+120) = 180 - 170 = 10 degrees. We know this because all angles must add up to 180 degrees.