alleryA triangle has angles of 48° and 67° at two corners. How big is the third corner?
A65°
B75°
C115°
D132°
Answer & Solution
Correct answer: A. 65°
1. The three angles of a triangle total 180°.
2. 50° + 60° = 110°.
3. 180° - 110° = 70°; 130° is the sum of 180° - 50°, which is a wrong step.
_Source: Wikipedia, Triangle, opening paragraph_
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