Typically we all know the polygon names up to Hexagon or perhaps Octagon, but what comes next?

Is there actually a name for a 27 sided pentagon? Yes there is.

If you want to learn how to put a stop to the dreaded Summer Math Loss and send your child back to school in September feeling like a math super-hero then watch this free video training. |

The simple version (and the one most people use) is 27-gon. But where is the tounge twisting fun in that? Doesn't Icosaheptagon sound so much more interesting?

My son has so much fun with these. He is only six but he just loves to say the names in between fits of the giggles!

**Below, you will find a complete list of Polygon names that are currently in use, and names that have been proposed.**

## Number of Sides |
## Name |

N |
N-gon |

3 |
Triangle |

4 |
Quadrilateral |

5 |
Pentagon |

6 |
Hexagon |

7 |
Heptagon |

8 |
Octagon |

10 |
Decagon |

12 |
Dodecagon |

9 |
Nonagon |

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 |

If you enjoyed learning these polygon names, why not explore our Steps to Geometry Success

or

Explore all that this site has to offer from here.

You can send me a quick message, subscribe to K6Math Fun & Update, or join my Facebook Page - K6Math. Choose all the options so you don't miss any of the new material added to this site.