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Q: Can a concave quadrilateral be a regular polygon?

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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.

Concave quadrilateral.

No, regular polygons are always convex and are shapes constructed using straight lines. concave polygons are irregular.

A concave polygon cannot be regular because regularity requires all angles (and sides)to be of equal measure. Even if you drop the requirement of regularity, there cannot be a concave triangle.

its a regular quadrilateral * * * * * No it is NOT! The sides of a rectangle, in general, are not all the same length and, therefore, it is not a regular polygon.

Related questions

No. There can be no regular concave polygon.

No not every quadrilateral can be a regular polygon.

No.

which type of quadrilateral is never a regular polygon

no because it is curved I think and polygons cannot be curved.

Dragon is the answer

A 4 sided quadrilateral is only a regular polygon when it is in the shape of a square

no

no

No.

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 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.

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