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

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

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

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Angles the a nonagon:

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

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

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Non-examples

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

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There are more than 9 political parties in this figure. So, that is not a nonagon.
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There room 8 political parties in this figure. So, the is not a nonagon.

Regular nonagon

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

Each angle of a continual nonagon is of 140°.

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Irregular nonagon

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

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Fun facts around nonagons

A nonagon is additionally called enneagon, i beg your pardon is acquired from a Greek word referred to as enneagonon, which method nine corners.

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The very first use of the word nonagon dates back to the beforehand 17th century, and also has a Latin prefix (nona) and also a Greek suffix (gon), making it a polygon with nine sides and also nine angles.