There is no formula for how many sides there are in a polygon; the name of the polygon shows how many sides it has.
There is not a name for such a polygon. A polygon with one million sides is called a megagon though..
the name of the polygon with 101 sides is hecatontakaihenagon
A polygon with 4 sides is a quadrilateral.
If the polygon above has 5 sides is it a concave or a convex
That is called a regular polygon.
That is called a regular polygon.
If a polygon's sides are all of equal length, it is known as a regular polygon. (The measure of each of its angles will be the same as well)
Rhombus
It is a Rectangle
The name of a polygon with 15 sides is a pentadecagon
There is no formula for how many sides there are in a polygon; the name of the polygon shows how many sides it has.
There is no name because such a polygon does not exist. A polygon must have at least three sides.
A pentagon is the polygon with 5 sides.
A polygon with seven sides is a heptagon.
There is not a name for such a polygon. A polygon with one million sides is called a megagon though..
A polygon with 6 sides is called a hexagon.