Nonagon.
a pentagon.
quadrilateral
hexagon
A decihedron. Deci means 10.
1200 sided figure is chiliadihectagon
A 17 sided figure is a heptadecagon.
octogon
hexagon
icosikaihena
Nonagon
it is a Dodecagon
Nonagon.
a pentagon.
octogon an octagon
icosagon icosagon
quadrilateral