Endecagon or hendecagon.
An undecagon has 11 sides
Chat with our AI personalities
hendecagon
An endecagon
A million sided shape shape is called a megagon.
There is no such thing as a 1 sided shape nor a two sided shape.
An octagon is an 8 sided 2 dimensional shape. A cylinder with the base of a hexagon (6 sided shape) would be an 8 sided 3 dimensional shape.