Perpendicular

Pronunciation: /ˌpɜr pənˈdɪk yə lər/ ?

Lines are perpendicular if they make a right angle where they intersect[1][2].

Lines that are perpendicular.
Perpendicular lines Perpendicular lines
Lines that are not perpendicular.
Non-perpendicular lines Non-perpendicular lines Parallel lines

References

  1. Keller, Samuel Smith. Mathematics for Engineering Students, Plane and Solid Geometry, pp 3, 64-65. D. Van Nostrand Company, 1908. (Accessed: 2010-01-02). http://www.archive.org/stream/mathengineer00kellrich#page/5/mode/1up/search/perpendicular.
  2. Casey, John, LL.D., F.R.S.. The First Six Books of the Elements of Euclid, pg 7. Casey, John, LL.D. F.R.S.. Hodges, Figgis & Co., 1890. (Accessed: 2010-01-02). http://www.archive.org/stream/firstsixbooksofe00caseuoft#page/7/mode/1up/search/perpendicular.
  3. perpendicular. http://wordnet.princeton.edu/. WordNet. Princeton University. (Accessed: 2011-01-08). http://wordnetweb.princeton.edu/perl/webwn?s=perpendicular&sub=Search+WordNet&o2=&o0=1&o7=&o5=&o1=1&o6=&o4=&o3=&h=.

More Information

  • McAdams, David. Line. allmathwords.org. All Math Words Encyclopedia. Life is a Story Problem LLC. 2009-03-12. http://www.allmathwords.org/article.aspx?lang=en&id=Line.

Cite this article as:


Perpendicular. 2009-12-21. All Math Words Encyclopedia. Life is a Story Problem LLC. http://www.allmathwords.org/en/p/perpendicular.html.

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Revision History


2009-12-21: Added "References" (McAdams, David.)
2008-09-02: Expanded 'More Information' (McAdams, David.)
2007-07-12: Initial version (McAdams, David.)

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