The name of a 100 sided polygon is Hectogon.
hectogon, centagon
This may sound funny, but it is actually called a 100-agon.
A five-sided polygon is called a pentagon.
A 39 sided polygon is called a 39-gon.
A thousand-sided polygon is a chiliagon.
A 100 sided polygon is called a hectogon.
A 100-sided polygon is called a hectogon.
hectogon, centagon
The name of a 100 sided polygon is Hectogon.
A 100 sided polygon may be called a hectogon or hecatontagon, although it is usually referred to as a 100-gon.
A five sided polygon is called a pentagon because pentagon means five sided polygon I think.
This may sound funny, but it is actually called a 100-agon.
I would just call it an "800-sided polygon."
A 13 sided polygon is called a Tridecagon also a Triskaidecagon.
A 14 sided polygon is called a tetradecagon.
A 12-sided polygon is called a dodecagon.
A million-sided polygon is called a megagon.