It's quite acceptable to call it a 100-agon but what's more important is knowing how to work out its properties
Hectagon
Hectogon, or more uncommonly, Hecatontagon.
You call it a Chilligon. "Chilli" is Greek and means 100 and "gon" is the prefix.
a 10000 sided shape is a myriagon some people call polygons: 10-gon 100-gon 1000-gon and so on
You could just call it a 100-gon. In English there's no word for a 100 sided polygon. in Latin, it would be centagon, using the prefix -centa meaning 100.
Hectogon is a 100 sided polygon. It looks like a circle but under high magnification you can see the linear details.
An 800-sided polygon is called an octahectagon. The prefix "octa-" denotes eight, while "-hectagon" indicates a polygon with 100 sides. Therefore, an octahectagon has 8 * 100 = 800 sides.
hecta- is the prefix for 100, so probably hectagon.But a 90 sided polygon is Enneacontagon
There is no established English word for a 100-sided polygon. However, there are three possible names: 100-gon Hectogon - Greek name Centagon - Latin/Greek name
what do we call in the two sided fastener
you call a seven sided shape a heptagon.
A 60 sided shape is called a hexaconta. The hex prefix means 6 and the conta suffix is used for polygons with 20 to 100 sides.