Yes.
An eight sided figure is called an octagon.
An 11 sided figure is called a hendecagon, an undecagon, or a 11-gon.
A 5-sided figure is called a pentagon.
A six sided figure is called a hexagon, as "hex" means "six."
A 1000 sided shape (through science, general guessing, and cups of tea) is called a kilogon
Yes.
An eight sided figure is called an octagon.
A 3-sided figure is called a triangle.
A four sided figure is called a quadrilateral.
A 12-sided figure is called a dodecagon.
A seven sided figure is called a heptagon.
It is a 1000 sided geometric figure.
A six-sided plane figure is called a hexagon.
A six-sided plane figure is called a hexagon.
A 1000 sided shape is called a Chiliagon.
A six sided figure is called a hexagon.