What is the name of polygons from 11-100 sides?

Answer 1

111

Answer 2

If you wish to communicate information, I suggest you call an 89-sided polygon an 89-gon (for example). Although there is a prefix for 89 it is best to keep it simple. Not only is the use of long Greek prefices pretentious, you will only annoy the reader who will probably have to consult a dictionary.

Having said that, if you do want to be pretentious or obfuscate, you can use the link below for polygons with up to 999 sides.