A 49-sided polygon is called a tetracontakaienneagon. The name is derived from the Greek prefixes tetraconta- (meaning forty) and ennea- (meaning nine) and the suffix -agon (meaning angle). The internal angles of a regular tetracontakaienneagon measure 171.43 degrees, and it has 49 sides and 49 vertices.
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Well, darling, a 49-sided shape is called a "heptacontakaienneagon." Yes, it's a mouthful, but hey, math isn't always about simplicity. So next time you come across a shape with 49 sides, you can impress your friends by dropping that fancy term like it's nobody's business.
The 22 sided shape is called a: ICOSIKAIDIGON
Hommasquabblelagagon
A five-sided shape is called a pentagon.
A 10-sided shape is called a decagon.
It is called a megagon. A ∞ sided shape is called an apeirogon.