A fifteen sided shape is called a pentadecagon. It is sometimes called a quindecagon or a pentakaidecagon.
The name of a fifteen sided polygon is known to have two names : pentakaidecagon, pentadecagon John Irving Dr. Math
The name for a 57 sided shape is derived by combining the name for a 50 sided shape with the name for a 7 sided shape. A 57 sided shape is called a pentacontaheptagon.
A 14 sided shape is called a Tetradecagon.
hundred sided shape is called a chlligon
A million sided shape is called a Megagon.
A 70 sided shape is called a heptacontagon.
A triacontakaihexadecagon is the name for a 36 sided shape.
a twelve sided shape is called a dodecagon.
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 name of a 20 sided 3d shape is called a icosahedron
A regular 5-sided shape is called a pentagon.