| n-gons (n=sides and n=angles) | ||||
| Number | central | angles | ||
| of Sides | Name | angles | (interior | |
| angles) | ||||
| n | 360/n | 180(n-2)/n | ||
| 3 | equilateral triangle | |||
| 4 | regular quadrilateral or square | |||
| 5 | regular pentagon | |||
| 6 | regular hexagon | |||
| 7 | regular heptagon | |||
| 8 | regular octagon | |||
| 9 | regular nonagon | |||
| 10 | regular decagon | |||
| 11 | regular undecagon | |||
| 12 | regular dodecagon | |||
| 13 | regular triskagon | |||
| 14 | regular tratagon | |||
| 15 | regular pentadecagon | |||
| 16 | regular hexadecagon | |||
| 17 | regular heptakaidecagon | |||
| 18 | regular octakaidecagon | |||
| 19 | regular enneakaidecagon | |||
| 20 | regular icosagon | |||
| 100 | regular hecatogon | |||
| 1000 | regular chiliagon | |||
