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A 'concave decagon' is a ten-sided shape with every other corner pushed in towards the centre. It forms a regular five-pointed star.

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Q: What polygon is a regular star?
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Related questions

Is a star a regular polygon?

Yes. A star is a regular polygon.


Is a star a regular polygon or a polygon?

I think regular. * * * * * Only if you ignore all the points where the sides cross one another.


Would a star be an irregular polygon?

No. An irregular polygon is a polygon whose sides are pretty much out of control. They are usually not equal to any other one side. So, no, a star is actually a REGULAR polygon.


Is a hexagon a regular polygon or not a regular polygon?

A 6 sided hexagon polygon can be regular or irregular.


What is a concave polygon with at least 3 lines of symmetry?

A regular six pointed star.


What is A polygon that is not regular?

its a not regular polygon


What is a polygon that has all congruent sides and all congruent angles?

a "regular" one


What is a regular polygon vs a not regular polygon?

A regular polygon is a polygon whose sides are equal length and whose angles are all the same value. A non regular polygon is just the opposite of a regular polygon.


Is a star shape an irregular polygon?

Not all are. Not only is it a concave shape, but the interior angles can vary. For a polygon to be regular, it must be equilateral and equiangular.


Is a traingle a regular polygon or a polygon?

A triangle (not traingle) is a polygon. It can be a regular polygon but need not be.


Why is a star polygon concave?

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


What is the difference between a regular polygon and non-regular polygon?

All the sides of a regular polygon have the same length. If two or more sides of a polygon have different lengths, then the polygon is not regular.