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Its enneadecagon and 19
enneadecagon or enneakaidecagon
The name of a 19 sided polygon is Enneadecagon.
Enneadecagon, or also known as Enneakaidecagon.
19
Its enneadecagon and 19
An Enneadecagon
Enneadecagon, or a enneakaidecagon
An enneadecagon is a polygon having 19 sides.
It is enneadecagon (or enneakaidecagon or nonadecagon).
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Enneadecagon, or also known as Enneakaidecagon. It's perfectly acceptable to call it a 19-agon
Hendecagon has 11 sides,dodecagon has 12 sides,triskaidecagon has 13 sides,tetradecagon has 14 sides,pentadecagon has 15 sides,hexadecagon has 16 sides,17 sides is heptadecagon,octadecagon have 18 sides,enneadecagon has 19 sides,20 sides is called as icosagon. The prefix of that 9 polygons is Greek. A polygone with 4 sides is called a quadrilateral.
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enneadecagon
It is called an enneadecagon.