A pentadecagon, although I prefer 15-gon.
A fifteen sided shape is called a pentadecagon.
A fifteen sided shape is called a pentadecagon. It is sometimes called a quindecagon or a pentakaidecagon.
pentadecagon
14 tetrakaideca 15 enneakaideca
The exterior angles of a 15 sided shape add up to 360 degrees
156 degrees
it is called a seven sided shape in Canada
The name of a fifteen sided polygon is known to have two names : pentakaidecagon, pentadecagon John Irving Dr. Math
Pentadecagon actually, no, it is called a fifteen-gon, or fifteen-a-gon. anything more than 12(dodecagon) the name of the polygon is just the number of sides, and "gon" at the end.
The 22 sided shape is called a: ICOSIKAIDIGON
Hommasquabblelagagon
A 90 sided shape is called Enneacontagon.