The provided nonagon ABCDEFGHI has actually sides AB, BC, CD, DE, EF, FG, GH, HI, and IA and also angles ∠A, ∠B, ∠C, ∠D, ∠E, ∠F, ∠G, ∠H, and also ∠I.

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The blue heat segments AC and BD room its diagonals.

There are complete of 27 diagonals in a nonagon as shown below:

**Angles of a nonagon:**

A nonagon consists of 9 angles. The amount of angle of a nonagon is 1260°.

A nonagon has 9 exterior angles. The amount of angles of the exterior angles of a nonagon is 360°.

**Non-examples**

The adhering to shapes are not nonagons. Let us see why?

There are an ext than 9 political parties in this figure. So, it is not a nonagon. | |

There are 8 political parties in this figure. So, that is not a nonagon. |

**Regular nonagon**

A nonagon in which all sides space equal and also all angles space equal is a continuous nonagon.

Each angle of a consistent nonagon is of 140°.

**Irregular nonagon**

A nonagon in which all sides room not equal and all angles space not equal. The measure of its angles space different but total amount of every its interior angles is constantly 1260°.

A nonagon is likewise called enneagon, i beg your pardon is obtained from a Greek word called enneagonon, which way nine corners. The very first use of words nonagon dates back to the early 17th century, and also has a Latin prefix (nona) and a Greek suffix (gon), making the a polygon v nine sides and nine angles. |