If you wish to communicate, then 135-gon. If you want to irritate, obfuscate or simply be pretentious that you might use the Greek prefix.
you call a seven sided shape a heptagon.
A 30 sided shape is called a Triacontagon.
A 200 sided shape is called a dictogon
If it is a regular 8 sided octagon then each interior angle is 135 degrees
this shape is called a Pentacontagon
you call a seven sided shape a heptagon.
An 11 sided shape is an Eptogon
A seven sided shape is called a heptagon.
A 12-sided shape is called a dodecagon.
A 30 sided shape is called a Triacontagon.
You can call a 101-sided shape a hecatontakaihenagon. The "hecto-" in the word means "one hundred" and the "henagon" means "one-sided geometric shape."
A nine sided shape or polygon is called a nonagon.
118-sided shape is called a hectadecakaioctagon.
A 200 sided shape is called a dictogon
If it is a regular 8 sided octagon then each interior angle is 135 degrees
Why not just call it "a 130-sided shape"? because its not called that, spaz.
A five sided geometric shape is called a pentagon.