No particular individual name is in common use. Not all plane shapes have a specific name, that would not be possible. The suffix used for many shapes is .....-agon. It is perfectly permissible to say a twentyseven-agon
A 999 sided shape is simply known as a 999 sided shape.
It's quite acceptable to call it a 999-agon but what's more important is working out its properties
It is quite acceptable to call it a 201-agon but what's more important is knowing how to work out its properties.
It is quite acceptable to call them an 11-agon to a 100-agon but what is more important is knowing how to work out their properties.
An n-gon has n sides.Incidentally, it is not called a n-agon.
16-agon
27-agon
Polygons.Polygons.Polygons.Polygons.
308474-agon
It is called a 1000-agon.
A 69-agon any polygon with more than 10 sides has however many sides + agon i think...
It's acceptable to call it a 115-agon
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Ipirotikos Agon was created in 1923.
The population of Agon-Coutainville is 2,723.
Agon - ballet - was created in 1957.