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 |