## What is a 16 sided figure called?

hexakaidecagon

In geometry, a polygon or a geometrical shape with 16 sides is called a hexakaidecagon or hexadecagon. This is also known as 16-gon. The measure of each internal angle of a regular hexadecagon is 157.5 degrees.

## What is the name of a 21 sided shape?

henicosagon

What is the name of a polygon with…?

# | Name of the Polygon + Geometric Drawing |
---|---|

20 sides | icosagon |

21 sides | henicosagon |

22 sides | doicosagon |

23 sides | triaicosagon |

**What’s a 20 sided shape called?**

icosagon

In geometry, an icosagon or 20-gon is a twenty-sided polygon. The sum of any icosagon’s interior angles is 3240 degrees.

### What is a 22 sided shape called?

Systematic polygon names

Ones | Twenties | |
---|---|---|

20 | ||

1 | hena- | 21 |

2 | di- | 22 |

3 | tri- | 23 |

### What is a 99 sided shape called?

nonacontakainonagon

What is a 99 sided shape called? In geometry, an enneacontagon or enenecontagon or 90-gon is a ninety-sided polygon. Thus, the 99 sided shape is called nonacontakainonagon or enneacontanonagon. Here, enneaconta is the prefix for the number of sides numbered from 90 to 99.

**What is a 80 sided shape called?**

Octacontagon

Other polygons

Polygon | Name | n (sides) |
---|---|---|

80 – sided polygon | Octacontagon | 80 |

90 – sided polygon | Enneacontagon | 90 |

100 – sided polygon | Hectagon | 100 |

1,000 – sided polygon | Chiliagon | 1,000 |

#### What’s a 666 sided shape called?

Chiliagon

Regular chiliagon | |
---|---|

Coxeter–Dynkin diagrams | |

Symmetry group | Dihedral (D1000), order 2×1000 |

Internal angle (degrees) | 179.64° |

Properties | Convex, cyclic, equilateral, isogonal, isotoxal |

#### What is a 0 sided shape called?

Polygons

Polygon Name | Number of Sides | Number of Diagonals |
---|---|---|

Triangle | 3 | 0 |

Quadrilateral | 4 | 2 |

Pentagon | 5 | 5 |

Hexagon | 6 | 9 |

**What is a billion sided shape?**

A gigagon is a two-dimensional polygon with one billion sides.