10
Answer: ASet 3: Triangles (Beginner)
Explanation
PROBLEM
A triangle has angles of 72 degrees and 77 degrees. What is the third angle?
A triangle has angles of 72 degrees and 77 degrees. What is the third angle?
A.✓ Correct
31
B.
32
C.
29
D.
33
Detailed Explanation
Choice A is the best answer. Third angle = 180 - 72 - 77 = 31 degrees
Why others are wrong:
B: 32 is incorrect because it does not satisfy the equation.
C: 29 is incorrect because it does not satisfy the equation.
D: 33 is incorrect because it does not satisfy the equation.
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