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It must have at least one internal angle which is a reflex angle - that is, between 180 and 360 degrees.
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What is a nonconvex polygon?
A nonconvex polygon is a concave polygon. All polygons with 4 or more sides can be concave. An arrowhead is an example of a concave quadrilateral. The back of an envelop (where the sides are folded and glued together) is a concave pentagon.
A pool is in the shape of a polygon. The segments and vertices of the polygon are shown. Is this polygon convex or concave?
concave
What is a polygon that bends in?
It is a concave polygon. There are polygons of 4 or more sides that are concave.
A polygon that is not convex?
Is a concave polygon.
Is a concave polygon a regular polygon?
No, a concave polygon cannot be a regular polygon.
A square is an example of a quadrilateral that is both a regular concave polygon and a regular convex polygon?
No. There can be no regular concave polygon.
What is the difference between a concave polygon and a convex polygon?
Any polygon that has an angle that is > 180º is a concave polygon. A convex polygon does not. e.g. All regular polygons are convex.
Is a noncovex polygon the same as concave polygon?
Yes.
What is a polygon with an inward vertex called?
A concave polygon.
What is a concave angle?
A concave angle is an angle, of a polygon that caves in.
What is a five sided concave polygon called?
A [concave] pentagon.
Is a pentagon a concave polygon?
No.
