It is called a regular polygon.
* * * * *
Actually not. All its angles must also be congruent for it to be called regular.
It all depends on what kind of polygon it is. It may have no congruent sides or all congruent sides.
A regular polygon is a polygon with congruent sides and interior angles.
It is an equilateral polygon. It is not a regular polygon. For the polygon to be regular, it is not enough for the sides to be congruent: all the angles need to be congruent as well.
It's equilateral !!! A polygon with all sides congruent is equilateral.
A regular polygon
a regular polygon
It is a regular polygon
It would be an irregular polygon that has not congruent sides and angles
That's a regular polygon.
Any regular polygon
An irregular polygon
It is a regular polygon