Coterminal

Pronunciation: /ˌkoʊ ˈtɜr mə nl/ ?
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Manipulative 1: Coterminal angles. Created with GeoGebra.

Two angles are coterminal if they have a common terminating line segment (terminus).[1] Coterminal angles may make a full circle, or involve rotating the terminus through at least one full circle. Click on the blue point in manipulative 1 and drag it to change the figure. In manipulative 1, angles α and β are coterminal.

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Manipulative 2: Coterminal line segments. Created with GeoGebra.

Two line segments are coterminal if the have a common end point. Click on the blue points in manipulative 2 and drag them to change the figure. In manipulative 2, line segments a and b are coterminal.

Cite this article as:


Coterminal. 2010-01-05. All Math Words Encyclopedia. Life is a Story Problem LLC. http://www.allmathwords.org/en/c/coterminal.html.

Image Credits

Revision History


2010-01-05: Added "References" (McAdams, David.)
2008-12-27: Added text and manipulative on coterminal lines (McAdams, David.)
2008-12-02: Initial version (McAdams, David.)

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