A 6 sided polygon is called an hexagon
the side of a polygon is 6
The name for this polygon is a nonagon,
The name of a 6 sided polygon is Hexagon.
The name of a 7 sided polygon is Heptagon.
A hendecagon or an undecagon is the name of a polygon which has eleven sides.
A polygon with 6 sides is called a hexagon.
Not surprisingly, it is called a side!
"Heptagon" is the name of a 7-sided polygon.