The name of a 22 sided polygon is Icosidigon.
Using systematic polygon naming, a twenty-two sided polygon would be called an icosakaidigon.
The name of a 21 sided polygon is Icosihenagon.
A twenty sided polygon is called an icosagon - from the Greek words "icosi", meaning twenty, and "gonus", meaning angle, or knee.
A five sided polygon is called a pentagon because pentagon means five sided polygon I think.
The name of a 22 sided polygon is Icosidigon.
Using systematic polygon naming, a twenty-two sided polygon would be called an icosakaidigon.
The name of a 21 sided polygon is Icosihenagon.
The name of a 29 sided polygon is Icosikaienneagon.
A twenty sided polygon is called an icosagon - from the Greek words "icosi", meaning twenty, and "gonus", meaning angle, or knee.
== ==
there is no such thing as two-sided polygon.
a 24 sided polygon is a icosikaitera.
The interior angles of a 20 sided polygon add up to 3240 degrees
There is no such thing as a two-sided polygon.
icosikaipentagon, I think
A four-sided polygon has two diagonals.