# Octagon

Pronunciation: /ˈɒk.təˌgɒn/ Explain

 Click on the blue points and drag them to change the figure. Manipulative 1 - Octagon Created with GeoGebra.

 Click on the blue points and drag them to change the figure. Manipulative 2 - Regular Octagon Created with GeoGebra.

A octagon is any eight sided polygon. A regular octagon is an eight-sided polygon with sides of equal length.

As long as the sides do not intersect, the figure in manipulative 1 is an octagon.

Octagon Facts
NameValue
Central Angle
Vertex Angle
Exterior Angle
Area
Table 1

 Octagonal Prism Octagonal Antiprism Table 2

### References

1. McAdams, David E.. All Math Words Dictionary, octagon. 2nd Classroom edition 20150108-4799968. pg 129. Life is a Story Problem LLC. January 8, 2015. Buy the book

McAdams, David E. Octagon. 3/25/2019. All Math Words Encyclopedia. Life is a Story Problem LLC. https://www.allmathwords.org/en/o/octagon.html.

### Revision History

12/21/2018: Reviewed and corrected IPA pronunication. (McAdams, David E.)