Base (Geometry)

Pronunciation: /beɪs/ Explain
Image of a triangle showing the base and an image of a cone showing a base.
Figure 1 - Base.

The base of a geometric figure is the 'bottom' of the figure.[1] However, many geometric objects can be considered to have more than one base. For example, any side of a triangle can be considered a base.


  1. McAdams, David E.. All Math Words Dictionary, base. 2nd Classroom edition 20150108-4799968. pg 24. Life is a Story Problem LLC. January 8, 2015. Buy the book
  2. base. Encyclopedia Britannica. Merriam-Webster. Last Accessed 6/19/2018. Buy the book
  3. Davies, Charles, LL.D.. Element of Geometry and Trigonometry with Applications in Mensuration. pg 14. A.S. Barnes & Company. 1855. Last Accessed 6/19/2018. Buy the book

Cite this article as:

McAdams, David E. Base (Geometry). 12/21/2018. All Math Words Encyclopedia. Life is a Story Problem LLC.

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Revision History

12/21/2018: Reviewed and corrected IPA pronunication. (McAdams, David E.)
6/22/2018: Removed broken links, updated license, implemented new markup. (McAdams, David E.)
1/4/2010: Added "References". (McAdams, David E.)
11/20/2008: Initial version. (McAdams, David E.)

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