a decagon
octogon an octagon
Circle
a 5-sided shape is called a pentagon.
it is a trigon or as most people call it triangle
NET
you call them problems because you need to figure it out and it could come in your life and you have to figure it out
1200 sided figure is chiliadihectagon
my friends and i call it skating
A 17 sided figure is a heptadecagon.
Rotation.
Perimeter
I would call it a 102-gon.
octogon
hexagon
icosikaihena
Nonagon