The proper name is icositrigon. Most people, including mathematicians, will use 23-gon since that effectively communicates the size of the polygon. But, if you want to appear pretentious or be obfuscatory, by all means use the Greek prefices.
an Irregular Polygon
an irregular polygon
A regular polygon
A regular polygon.
The name of a sided polygon is Octaconpentagon.
Any polygon has 3 or more sides
A cyclic polygon.
Just call it a "24-sided polygon".
icosihenagon= 21-sided polygon icosihenagon= 21-sided polygon
The constructed polygon name for a 24-sided regular polygon is an icosikaitetragon.
a polygon with 12 sides is called a.. dodecagon
The name of a 33 sided polygon is riacontakaitrigon.