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 Name Value Central Angle Vertex Angle Exterior Angle Inradius Circumradius Area Table 1

Geometric Nets Using Octagons

Octagonal Prism

Octagonal Antiprism

Table 2

Examples of Octagons

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

Cite this article as:

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

Image Credits

• All images and manipulatives are by David McAdams unless otherwise stated. All images by David McAdams are Copyright © Life is a Story Problem LLC and are licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.
• Darkstone: Arturo D. Castillo, commons.wikimedia.org. This file is licensed under the Creative Commons Attribution 3.0 Unported license. https://commons.wikimedia.org/wiki/File:Darkstone.png.

Revision History

12/21/2018: Reviewed and corrected IPA pronunication. (McAdams, David E.)
9/5/2018: Removed broken links, updated license, implemented new Geogebra protocol, implemented new markup. (McAdams, David E.)
12/21/2009: Added "References". (McAdams, David E.)
12/30/2008: Changed equations to images. (McAdams, David E.)
7/1/2008: Initial version. (McAdams, David E.)