There is not a name for such a polygon. A polygon with one million sides is called a megagon though..
I don't know the exact amount when it starts, but I just tried it with 1 trillion sides and each angle was 180. So we know it starts between 1 billion and 1 trillion sides.
Polygons can't have curved sides so the answer is not a polygon.
trapazoid
While there is no prevalent name for such a polygon, due to its insurmountable number of sides (to the unaided eye, it would be indistinguishable from a circle; such a polygon would still be indistinguishable from a circle if it were the same size as the sun, and would need to be several lightyears in diameter before its angles would be discernible and its perimeter of significant distance from that of a corresponding circle). A term can be inferred from the metric naming system: 1 billion is represented by 'giga', ten by 'deca', so an approximate name would be 'decagigagon'.
360/1 = 360 sides
a 1 billion sided polygon is made up of 100 of the 1 million sided polygon
The term n-gon, where n is the number of the polygon's sides, also it could be used to name a polygon. For example, a polygon with 15 sides is a 15- gon.
There is no polygon with one side.
Any polygon can have only 1 pair of perpendicular sides.
I don't know the exact amount when it starts, but I just tried it with 1 trillion sides and each angle was 180. So we know it starts between 1 billion and 1 trillion sides.
There is no such thing, the smallest amount of sides a shape can have is 3 (Triangle).
There is no limit on how big a name for a polygon is. Typically after Dodecagon (12 sides) the polygons are referred to as an n-gon, where n is referring to the number of sides on the polygon. A Myrigon is a 10,000-gon , a Megagon is a 1,000,000-gon, a Googolgon is a 1 * 10^100-gon
Polygons can't have curved sides so the answer is not a polygon.
Since a three sided polygon is another name for a triangle. We would use the formula of * (n - 2)180 = degrees of the polygon * n = number of sides of the polygon * (3(sides) - 2)180 * (1)180) * = 180o
A gigagon is a polygon with a billion sides. To an engineer it would pass as a circle. To a physicist or mathematician it would still be a polygon.
trapazoid
While there is no prevalent name for such a polygon, due to its insurmountable number of sides (to the unaided eye, it would be indistinguishable from a circle; such a polygon would still be indistinguishable from a circle if it were the same size as the sun, and would need to be several lightyears in diameter before its angles would be discernible and its perimeter of significant distance from that of a corresponding circle). A term can be inferred from the metric naming system: 1 billion is represented by 'giga', ten by 'deca', so an approximate name would be 'decagigagon'.