What is the name of 61-69 sided polygon?

Answer 1

A 61-sided polygon is called a hexacontakaihenagon, while a 62-sided polygon is known as a hexacontadihenagon. Similarly, a 63-sided polygon is referred to as a hexacontatrigon, a 64-sided polygon is called a hexacontatetragon, and so on, up to a 69-sided polygon, which is termed a hexacontanonaagon. These names derive from the Greek numerical prefixes combined with the suffix "-gon," meaning "angle" or "corner."