1200 sided figure is chiliadihectagon
Nonagon
it is a Dodecagon
icosagon icosagon
It is called a nonagon. There currently is no official name for a nine-sided polygon. However, two names have been proposed for such a figure: the first is a Nonagon; the second is an Enneagon.
A Pentagon. A five sided figure is a pentagon
A 17 sided figure is a heptadecagon.
Nonagon
it is a Dodecagon
icosikaihena
octogon
hexagon
a pentagon.
Nonagon.
I would call it a 102-gon.
octogon an octagon
icosagon icosagon
quadrilateral