Sides
Name
n
N-gon
3
Triangle
4
Quadrilateral
5
Pentagon
6
Hexagon
7
Heptagon
8
Octagon
10
Decagon
12
Dodecagon
Names for other polygons have been proposed.
Sides
Name
9
Nonagon, Enneagon
11
Undecagon, Hendecagon
13
Tridecagon, Triskaidecagon
14
Tetradecagon, Tetrakaidecagon
15
Pentadecagon, Pentakaidecagon
16
Hexadecagon, Hexakaidecagon
17
Heptadecagon, Heptakaidecagon
18
Octadecagon, Octakaidecagon
19
Enneadecagon, Enneakaidecagon
20
Icosagon
30
Triacontagon
40
Tetracontagon
50
Pentacontagon
60
Hexacontagon
70
Heptacontagon
80
Octacontagon
90
Enneacontagon
100
Hectogon, Hecatontagon
1,000
Chiliagon
10,000
Myriagon
To construct a name, combine the prefix+suffix
Sides
Prefix
20
Icosikai...
30
Triacontakai...
40
Tetracontakai...
50
Pentacontakai...
60
Hexacontakai...
70
Heptacontakai...
80
Octacontakai...
90
Enneacontakai...
