100*(100-3)/2 = 4850
196 x 90 = 17640o
A five-sided polygon is called a pentagon.
A 39 sided polygon is called a 39-gon.
A thousand-sided polygon is a chiliagon.
A 100-sided polygon is called a hectogon.
100*(100-3)/2 = 4850
196 x 90 = 17640o
A five sided polygon is called a pentagon because pentagon means five sided polygon I think.
A million-sided polygon is called a megagon.
A 12-sided polygon is called a dodecagon.
A 20-sided polygon is called an icosagon.
A 25 sided polygon is called a icosikaipentagon.
A 14 sided polygon is called a tetradecagon.
A 90-sided polygon is called an enneacontagon.
A five-sided polygon is called a pentagon.
A 13 sided polygon is called a Tridecagon also a Triskaidecagon.