If you wish to communicate information, I suggest you call it an 200-gon. Although there is a prefix for 200 (dihecta-) I suggest you keep it simple. Not only is the use of long Greek prefices pretentious, you will only annoy the reader who will probably have to consult a dictionary. Having said that, if you do want to be pretentious or obfuscate, you can use the link below for polygons with up to 999 sides. http://faculty.kutztown.edu/schaeffe/Tutorials/General/Polygons.html
it is called a seven sided shape in Canada
An five sided shape is called a Pentagon
a 69 sided shape is called a sexagon
A 90 sided shape is called Enneacontagon.
A 128-sided shape is called a hecatoicosioctagon.
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200-gon.
A 200-sided shape is called a dihectogon. The prefix "di-" indicates 200 in this context, and the suffix "-gon" denotes a polygon with a specific number of sides. Dihectogons are very rare in geometry and are not commonly encountered in practical applications.
it is called a seven sided shape in Canada
A one-sided shape is called a "monogon," which is a theoretical concept representing a shape with one side and one vertex. A two-sided shape is called a "digon," which is also a theoretical concept representing a shape with two sides and two vertices. In geometry, these shapes are considered degenerate cases and do not exist in the physical world.
A 10-sided shape is called a decagon.
An five sided shape is called a Pentagon
a 69 sided shape is called a sexagon
A 90 sided shape is called Enneacontagon.
A 35 sided shape is called a triacontakaipentagon
Hommasquabblelagagon
The 22 sided shape is called a: ICOSIKAIDIGON