alleryWhich set can be the three angles of a triangle?
A50, 60, 70
B90, 60, 50
C50, 60, 80
D40, 60, 70
Answer & Solution
Correct answer: A. 50, 60, 70
1. The angles of a triangle add up to exactly 180 degrees.
2. 50 + 60 + 70 = 180, so this set works.
3. 50 + 60 + 80 = 190, 40 + 60 + 70 = 170, and 90 + 60 + 50 = 200.
4. Only the first set has the sum 180.
_Source: Wikipedia, Triangle (CC BY-SA 4.0), Triangle_
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