An enneadeca
The name of a 19 sided polygon is enneadecagon.
A 19 sided polygon is called an enneakaidecagon.
The name of a 19 sided polygon is Enneadecagon.
A 19-sided polygon is an enneadecagon (also enneakaidecagon or nonadecagon).
The name of a 12 sided polygon is Dodecagon.
The name of a 19 sided polygon is enneadecagon.
A 19 sided polygon is called an enneakaidecagon.
The name of a 19 sided polygon is Enneadecagon.
A nineteen-sided regular polygon is called an enneadecagon.
n-gon
A 19-sided polygon is an enneadecagon (also enneakaidecagon or nonadecagon).
nontagon, or you can just say polygon
The name of a 12 sided polygon is Dodecagon.
The degrees in a 19 sided polygon add up to 3,060 degrees
name of 4000 sided polygon
A 8 sided polygon is called a octagon.
The interior angles of a 19 sided polygon add up to 3060 degrees