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Q: Can a concave figure be a regular polygon?

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No. There can be no regular concave polygon.

15

A triangle (or other polygon) on a concave surface (such as the inside of a sphere), possibly.

A circle :D

Yes, a regular polygon has all sides of equal length. An irregular polygon is any polygon that is not regular.

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No. There can be no regular concave polygon.

No, a concave polygon cannot be a regular polygon.

no

no

No.

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.

it is impossible

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

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.

FALSE my friends

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.

because the point of origin would be on an outer point and around it the walls seem to cave in making it seem concave, in comparison to a regular polygon. When checking for concave polygons always compare what you are looking at to a regular polygon

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