Pronunciation: /ɪkˈstɪər i ər/ Explain
Interior, exterior and boundary of a triangle
Figure 1: Interior and exterior of a triangle.

An object is on the exterior if it lies outside a boundary.

Click on the blue points and drag them to change the figure. Click on the red points and drag them to explore the interior and exterior.

Is the border of the polygon in the exterior or interior?
Manipulative 1 - Exterior and Interior of a Polygon Created with GeoGebra.

Cite this article as:

McAdams, David E. Exterior. 7/10/2018. All Math Words Encyclopedia. Life is a Story Problem LLC. http://www.allmathwords.org/en/e/exterior.html.

Image Credits

Revision History

7/5/2018: Removed broken links, updated license, implemented new markup, implemented new Geogebra protocol. (McAdams, David E.)
2/3/2010: Added "References". (McAdams, David E.)
4/1/2008: Initial version. (McAdams, David E.)

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