What is the properties of concave polygon?

A concave polygon is a type of polygon that has at least one interior angle greater than 180 degrees, which causes it to "cave in" toward the interior. This results in at least one vertex pointing inward, creating a shape that can have both convex and concave angles. Additionally, a line segment drawn between two points within a concave polygon may lie outside the polygon, distinguishing it from convex polygons where all such segments remain inside. Concave polygons can have any number of sides, but their defining characteristic is the presence of at least one concave angle.