icosagon
A polygon with 3 sides is called triangle A polygon with 4 sides is called quadrilateral A polygon with 5 sides is called pentagon A polygon with 6 sides is called hexagon A polygon with 7 sides is called heptagon A polygon with 8 sides is called octagon
A polygon with 20 sides is called either a 20-gon or an icosagon.
A polygon with 7 sides is called a heptagon.
Heptadecagon.
hectagon is the answer
A polygon with 20 sides is called an icosagon, while a polygon with 29 sides is called an enneakaikaienneagon. These names are derived from the Greek numerical prefixes "icosi-" and "enneakaikaiennea-", which mean twenty and twenty-nine, respectively. The suffix "-gon" is added to indicate a polygon.
A twenty-one-ogon.
A polygon with 21 sides is called an Icosagon.
The polygon that has 6 sides is called a hexagon
A polygon with seven sides is called a septagon.
a polygon with 9 sides is called a nonagon
A polygon with 10 sides is called a decagon.