A regular polygon
It is not possible to name each polygon since there are infinitely many of them. There is no relationship between whether a polygon is regular and the number of sides or angles that it has. So, there is no way to determine, from its name, if a polygon is regular.
That is called a regular polygon.
Chiliagon has 1000 sides. (In geometry, a chiliagon is a polygon with 1000 sides. The measure of each angle in a regular chiliagon is 179.64°.)
There is no name given to it. (As the number of sides increases, the upper limit of a regular polygon is a circle.)
A regular polygon
A regular hexagon.
A regular decagon
Only one polygon has a name starting with the letter "a". It is called the "Apeirogon", and it is a polygon with infinite sides.
That is called a regular polygon.
A polygon with eight sides, regular or not, is an octagon. There isn't a special name for a regular octagon (other than "regular octagon").
It is not possible to name each polygon since there are infinitely many of them. There is no relationship between whether a polygon is regular and the number of sides or angles that it has. So, there is no way to determine, from its name, if a polygon is regular.
triangel
That is called a regular polygon.
its an Octagon
There is no collective name for the infinite family of polygons with more than 8 sides.
It is usually a regular polygon that has equal sides.