Question

A concave polygon has .................... interior angles more than ${180}^o$.

• A. no
• B. 3 angles
• C. one or more
• D. less than 5

Answer 1

Answer: (C)

one or more

All angles less than ${180}^o$ is a convex polygon. Convex is opposite of concave, so at least one angle has to be more than ${180}^o$ to be a concave polygon.
Therefore, C is the correct answer.