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.

It's time to start gathering the materials you need to help your child slow down or stop the Math Summer Slide. Start with this resource of daily math facts practice. |

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

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