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Yes. 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.

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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.


Is a concave polygon a regular polygon?

No, a concave polygon cannot be a regular polygon.


A polygon that is not convex?

Is a concave 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 are the similarities between regular polygon and a concave polygon?

A regular polygon is a special kind of convex polygon - one in which all the sides are of the same length and all the angles are equal. Convex and concave polygons form disjoint sets: so no concave polygon can be regular.


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.

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