18-gon
A polygon refers to a plane figure that has at least three straight sides and angles. An 18 sided shape is called an octadecagon or octakaidecagon.
Icosagon is a 20 sided figure.
The name of a four sided figure (or shape) is called a Square. :)
The name that is given to an 8 sided figure is a octogan.
There is not a definite name for a 3D figure with 18 sides.It is possible that it is something else - but the information to test this is not provided.
A 5 sided figure is called a: pentagon
A 15-sided figure is called a pentadecagon.
The name of am 11-sided figure is a "hendecagon". ---- Also known as an "undecagon".
The name of a 18 sided polygon is Octadecagon.
A 5-sided figure is called a pentagon.
the name of a two sided figure is a jamie n its the coolest shape ever created the name of a two sided figure is a jamy n its the coolest shape ever created