A 20-sided flat figure (polygon) is called an icosagon. If it is a solid figure--three-dimensional--it is an icosahedron.
A twenty-sided shape in 2D is called a icosagon. It is a polygon with twenty edges and twenty vertices. The term comes from the Greek words "icosa," meaning twenty, and "gon," meaning angle.
Icosahedron is the shape, but it's just called 20 sided if you want to buy one.
A regular twenty-sided polygon is called an icosagon.
A polygon with 20 sides is called either a 20-gon or an icosagon.
A shape, or polygon, with 24 sides is called an icosikaitera. Many people simply refer to it as a 24-gon.
hendaciahedron
icosikaienneagon
A 23 sided polygon(shape) is called a icosikaitrigon, it can also be referred to as a 23-gon.
cosikaipentagon, or a cosipentagon
It is called a dretagalon
Icosahedron is the shape, but it's just called 20 sided if you want to buy one.
A regular twenty-sided polygon is called an icosagon.
A twenty sided, 2D figure is called an icosagon.
A polygon with 20 sides is called either a 20-gon or an icosagon.
it is a twenty sided shape
Icosahedron
a 24 sided polygon is a icosikaitera.