That is the correct spelling of "hexagon" (a 6-sided polygon).Hexagon.
If you mean a pentagon then it is a 5 sided polygon.
The prefix "dec" means ten. For example, the word "decagon" refers to a ten-sided polygon.
A convex hexagon is a six-sided polygon in which all interior angles are less than 180 degrees.
henaecasyllable (sorry about spelling) and you can look it up in the dictionary
A 27-sided polygon would be called an icosiheptagon.
it is called icosikaiheptagon
the sum of the interior angles in a 27 sided polygon is 4500.
A five sided polygon is called a pentagon because pentagon means five sided polygon I think.
A 24 sided polygon is called a icosikaitetragon.
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.