Octagon

Pronunciation: /ˈɒk təˌgɒn/ ?

Sorry, the GeoGebra Applet could not be started. Please make sure that Java 1.4.2 (or later) is installed and active in your browser (Click here to install Java now) Manipulative 1: Octagon Created with GeoGebra. Sorry, the GeoGebra Applet could not be started. Please make sure that Java 1.4.2 (or later) is installed and active in your browser (Click here to install Java now) Manipulative 2: Regular octagon Created with GeoGebra.

A octagon is any eight sided polygon.[1] A regular octagon is an eight-sided polygon with sides of equal length. Click on the blue points in manipulatives 1 and 2 and drag them to change the figure. As long as the sides do not intersect, the figure in manipulative 1 is an octagon. The figure in manipulative 2 is a regular octagon. To see the various parts of a regular octagon, click on the check boxes. 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. octagon. http://wordnet.princeton.edu/. WordNet. Princeton University. (Accessed: 2011-01-08). http://wordnetweb.princeton.edu/perl/webwn?s=octagon&sub=Search+WordNet&o2=&o0=1&o7=&o5=&o1=1&o6=&o4=&o3=&h=.

Cite this article as:

Octagon. 2009-12-21. All Math Words Encyclopedia. Life is a Story Problem.org. http://www.allmathwords.org/en/o/octagon.html.

Translations

• Chasque para ver este artículo en español.

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.org and are licensed under the Creative Commons Attribution-Noncommercial-Share Alike 3.0 License.

Revision History

2009-12-21: Added "References" (McAdams, David.)
2008-12-30: Changed equations to images (McAdams, David.)
2008-07-01: Initial version (McAdams, David.)