alleryA concave polygon has at least one interior angle of what size?
AEqual to 90 degrees
BEqual to 180 degrees
CLess than 90 degrees
DGreater than 180 degrees
Answer & Solution
Correct answer: D. Greater than 180 degrees
1. A concave polygon is simple but not convex.
2. It must have at least one interior angle greater than 180 degrees.
3. Angles of exactly 180 degrees or below describe convex shapes, so those fail.
_Source: Wikipedia, Polygon, section Convexity and intersection_
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