Most sensible mathematicians would call it a 240-gon.
Those with pretensions or who wish to obfuscate rather than communicate with their audiences might call it a dihectatetracontagon.
a pentagon.
Nonagon.
I would call it a 102-gon.
hexagon
quadrilateral
1200 sided figure is chiliadihectagon
A 17 sided figure is a heptadecagon.
Nonagon
it is a Dodecagon
octogon
hexagon
icosikaihena
a pentagon.
Nonagon.
I would call it a 102-gon.
octogon an octagon
icosagon icosagon