A concave polygon has at least one interior angle greater than 180°.Key CharacteristicsAt least one reflex angle (greater than 180°).Diagonals can go outside the polygon.It looks like it has a “dent” or inward curve.Not all vertices point outward.For example, a simple 5-sided shape (pentagon) with one corner pushed inward becomes a concave polygon.
A concave polygon is a polygon that has at least one interior angle greater than 180 degrees. This causes the polygon to have an indentation or a part that "caves in." Some of the diagonals in a concave polygon may also lie outside the shape. A concave polygon is always irregular and can have one or more reflex interior angles (greater than 180° but less than 360°). Examples include certain star shapes or polygons with inward-pointing vertices.Key characteristics of a concave polygon: Has at least one interior angle greater than 180°. Possesses at least one vertex that points inward. Some diagonals lie outside the polygon. Always irregular (cannot be regular). Sum of interior angles is [tex](n - 2) \times 180^\circ[/tex], where [tex]n[/tex] is the number of sides. Sum of exterior angles is always 360°.