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

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The blue line segments AC and also BD room its diagonals.

There are full of 27 diagonals in a nonagon as presented below:

**Angles the a nonagon:**

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

A nonagon has actually 9 exterior angles. The sum of angles of the exterior angle of a nonagon is 360°.

**Non-examples**

The adhering to shapes space not nonagons. Let united state see why?

There are an ext than 9 sides in this figure. So, that is not a nonagon. | |

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

**Regular nonagon**

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

Each angle of a consistent nonagon is that 140°.

**Irregular nonagon**

A nonagon in which every sides are not equal and all angles are not equal. The measure up of that is angles are different but total amount of every its internal angles is constantly 1260°.

A nonagon is also called enneagon, i beg your pardon is obtained from a Greek word referred to as enneagonon, which way nine corners. The an initial use of words nonagon dates ago to the early 17th century, and also has a Latin prefix (nona) and a Greek suffix (gon), making it a polygon with nine sides and also nine angles. |