19
Its enneadecagon and 19
enneadecagon or enneakaidecagon
11 regular hendecagon 12 regular dodecagon 13 regular triskaidecagon 14 regular tetradecagon 15 regular pentadecagon 16 regular hexadecagon 17 regular heptadecagon 18 regular octadecagon 19 regular enneadecagon 20 regular icosagon
The name of a 19 sided polygon is Enneadecagon.
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).
19
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.
33
11 Undecagon, Hendecagon 12 Dodecagon 13 Tridecagon, Triskaidecagon 14 Tetradecagon, Tetrakaidecagon 15 Pentadecagon, Pentakaidecagon 16 Hexadecagon, Hexakaidecagon 17 Heptadecagon, Heptakaidecagon 18 Octadecagon, Octakaidecagon 19 Enneadecagon, Enneakaidecagon 20 Icosagon
enneadecagon