A polygon is a 2-Dimensional plane figure which is made up of straight lines. A polygon is always a closed figure. The word “Polygon” comes from Greek, where **poly** means ** many** and

**gon**means

*angle.*## Types of Polygon

**Regular Polygon – ** A polygon with all the sides and angles equal
is a regular polygon.

**Irregular Polygon** – A polygon in which none of the sides and angles are equal.

**Concave Polygon** **– **If any of the internal angle of a
polygon is greater than 180⁰ than it is a concave polygon.

**Convex Polygon – **In
a convex polygon none of the angle is greater than 180⁰ that means it has no angle
pointing inwards.

**Simple Polygon – **It
has one boundary and does not cross over itself.

**Complex Polygon – **A
complex polygon intersects with itself.

## Different Types of Polygon

Polygon is generally named after the numbers of sides, *n-sides.*

Triangle | 3 | 60⁰ |

Quadrilateral | 4 | 90⁰ |

Polygon | 5 | 108⁰ |

Hexagon | 6 | 120⁰ |

Heptagon | 7 | 128.57⁰ |

Octagon | 8 | 135⁰ |

Nonagon | 9 | 140⁰ |

Decagon | 10 | 144⁰ |

Hendecagon | 11 | 147.27⁰ |

Dodecagon | 12 | 150⁰ |