Pronunciation: /ˌhɔr.əˈzɒn.tl/ Explain

A horizontal line segment, a vertical line segment, and a slant line segment.
Figure 1: Horizontal.

A geometric figure is horizontal if it goes from left to right or right to left. One way to remember is that the horizon is horizontal. The x-axis in a Cartesian coordinate system is conventionally horizontal.


  1. McAdams, David E.. All Math Words Dictionary, horizontal. 2nd Classroom edition 20150108-4799968. pg 91. Life is a Story Problem LLC. January 8, 2015. Buy the book
  2. Slaught, H. E. and Nels Johann. Intermediate Algebra. pg 94. www.archive.org. Allyn and Bacon. 1917. Last Accessed 7/18/2018. http://www.archive.org/stream/intermediatealge00slaurich#page/94/mode/1up/search/horizontal.

Cite this article as:

McAdams, David E. Horizontal. 12/21/2018. All Math Words Encyclopedia. Life is a Story Problem LLC. https://www.allmathwords.org/en/h/horizontal.html.

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Revision History

12/21/2018: Reviewed and corrected IPA pronunication. (McAdams, David E.)
7/16/2018: Removed broken links, updated license, implemented new markup, implemented new Geogebra protocol. (McAdams, David E.)
2/8/2010: Added "References". (McAdams, David E.)
12/9/2008: Initial version. (McAdams, David E.)

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