If two angles of a triangle have measures of 20 and 40 degrees, what is the measure of the third.
2 answers:
The sum of all angles in a triangle is 180. AngleA+AngleB+AngleC=180 20+40+AngleC=180 AngleC=120
All 3 angles must add up to 180. So 40 + 20 = 60. Subtract that from 180 and you get 120. There is your answer
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