An eleven sided shape is called a hendecagon.
An eleven-sided shape is called a Hendecagon.
hendecagon
Yes
Two-dimensional: Pentagon Three-dimensional: Pentahedron
It is called either a Sidagon or an Undecagon.
a hen decagon
Hendecahedron
It is a hendecahedron.
The name of an eleven sided geometric shape is a Hendecagon or endecagon.
It is a hendecagon.
A two-dimensional eleven-sided figure is called a hendecagon.