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

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The blue line segments AC and BD room its diagonals.

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

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Angles the a nonagon:

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

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

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Non-examples

The complying with shapes room not nonagons. Let united state see why?

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There are much more than 9 sides in this figure. So, it is no a nonagon.
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There are 8 political parties in this figure. So, the is no a nonagon.

Regular nonagon

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

Each edge of a regular nonagon is that 140°.

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Irregular nonagon

A nonagon in which every sides are not equal and all angles are not equal. The measure up of that is angles room different yet total amount of every its inner angles is always 1260°.

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Fun facts about nonagons

A nonagon is likewise called enneagon, which is acquired from a Greek word referred to as enneagonon, which way nine corners.

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The first use of words nonagon dates earlier to the early 17th century, and has a Latin prefix (nona) and also a Greek suffix (gon), making it a polygon through nine sides and also nine angles.