Oh, dude, a 21-sided polygon is called a icosikaihenagon. Yeah, I know, it sounds like something you'd make up after a few too many drinks at a math convention. But hey, that's the beauty of geometry - it's like a party where all the shapes get together and have a good time.
The names of polygons with sides ranging from 21 to 30 are as follows: a 21-sided polygon is called a icosagon, a 22-sided polygon is a dicosagon, a 23-sided polygon is a tricosagon, a 24-sided polygon is a tetracosagon, a 25-sided polygon is a pentacosagon, a 26-sided polygon is a hexacosagon, a 27-sided polygon is a heptacosagon, a 28-sided polygon is an octacosagon, a 29-sided polygon is a nonacosagon, and a 30-sided polygon is a triacontagon.
A five-sided polygon is called a pentagon.
A 39 sided polygon is called a 39-gon.
A thousand-sided polygon is a chiliagon.
hectoctagon is a 108 sided polygon
icosihenagon= 21-sided polygon icosihenagon= 21-sided polygon
The names of polygons with sides ranging from 21 to 30 are as follows: a 21-sided polygon is called a icosagon, a 22-sided polygon is a dicosagon, a 23-sided polygon is a tricosagon, a 24-sided polygon is a tetracosagon, a 25-sided polygon is a pentacosagon, a 26-sided polygon is a hexacosagon, a 27-sided polygon is a heptacosagon, a 28-sided polygon is an octacosagon, a 29-sided polygon is a nonacosagon, and a 30-sided polygon is a triacontagon.
Icosikaihenagon
The name of a 21 sided polygon is Icosihenagon.
An icosikaihena is a polygon with 21 sides
A five sided polygon is called a pentagon because pentagon means five sided polygon I think.
The name of a 21 sided polygon is Icosihenagon.
The term for a 21 sided polygon is an icosikaihenagon. Icosi is the Greek for the numerical 20 and henagon means 1.
A 14 sided polygon is called a tetradecagon.
A 12-sided polygon is called a dodecagon.
A million-sided polygon is called a megagon.
A 20-sided polygon is called an icosagon.