What is another word for reentrant polygon?
Pronunciation: [ɹiːˈɛntɹənt pˈɒlɪɡən] (IPA) 
A reentrant polygon is a polygon that contains at least one angle greater than 180 degrees. Other terms for this type of polygon include "concave" or "irregular" polygon. The opposite of a reentrant polygon is a "convex" polygon, which has all angles less than 180 degrees. Other synonyms for convex polygons include "regular" or "simple" polygons. A reentrant polygon can also be described as having "caves" or "notches". It's important to note that reentrant polygons can be more difficult to work with than convex polygons, as they can cause issues when trying to fill them or perform certain operations.
