The answer is an octagon.
An octagon.
octagon
An 8-sided polygon is called an octagon.
8 side = octagon 9 side= Nonagon 10 side= decagon
The name for this polygon is a nonagon,
An 8 sided polygon is an octagon
A 8 sided polygon is called a octagon.
The name of a 7 sided polygon is Heptagon.
A hendecagon or an undecagon is the name of a polygon which has eleven sides.
The name of a 8 sided polygon is Octagon.
Apothem!
Not surprisingly, it is called a side!