![]() ![]() A concave polygon has at least one angle which is a reflex angle, that is, it is more than 180° and less than 360°.Observe the following figure which shows concave polygons.Ī concave polygon has some distinct properties that help to distinguish it from other polygons. If any of the diagonals of a polygon are formed partly or fully outside the polygon, then it is called a concave polygon. Concave Polygon DefinitionĪ concave polygon is defined as a polygon in which one or more interior angles are more than 180°. ![]() For example, a star is a concave polygon. A concave polygon looks like a polygon in which at least two sides seem to be pushed inwards. If any interior angle in a polygon measures more than 180°, then that is a concave polygon. A polygon that is not convex is a concave polygon. ![]()
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