List of names of polygons by number of sides
Number |
Polygon |
Internal |
---|---|---|
3 | Triangle | 60° |
4 | Square or Quadrilateral | 90° |
5 | Pentagon | 108° |
6 | Hexagon | 120° |
7 | Heptagon | 128.571° |
8 | Octagon | 135° |
9 | Nonagon or Ennagon | 140° |
10 | Decagon | 144° |
11 | Hendecagon or Undecagon | 147.273° |
12 | Dodecagon | 150° |
13 | Triskaidecagon | 152.308° |
14 | Tetrakaidecagon | 154.286° |
15 | Pendedecagon | 156° |
16 | Hexdecagon | 157.5° |
17 | Heptdecagon | 158.824° |
18 | Octdecagon | 160° |
19 | Enneadecagon | 161.053° |
20 | Icosagon | 162° |
30 | Triacontagon | 168° |
40 | Tetracontagon | 171° |
50 | Pentacontagon | 172.8° |
60 | Hexacontagon | 174° |
70 | Heptacontagon | 174.857° |
80 | Octacontagon | 175.5° |
90 | Enneacontagon | 176° |
100 | Hectagon | 176.4° |
1000 | Chiliagon | 179.640° |
10000 | Myriagon | 179.964° |
100000 | Megagon | 179.996° |
10100 | Googolgon | ~180° |
Number |
Name |
Note |
Name |
Number |
---|---|---|---|---|
20 | Icosikai... |
Take the prefix |
... henagon | 1 |
30 | Triacontakai... | ... digon | 2 | |
40 | Tetracontakai... | ... trigon | 3 | |
50 | Pentacontakai... | ... tetragon | 4 | |
60 | Hexacontakai... | ... pentagon | 5 | |
70 | Heptacontakai... | ... hexagon | 6 | |
80 | Octacontakai... | ... heptagon | 7 | |
90 | Enneacontakai... | ... octagon | 8 | |
... enneagon | 9 |