Perpendicular

Pronunciation: /ˌpɜr.pənˈdɪk.jə.lər/ Explain

Lines are perpendicular if they make a right angle where they intersect^[2][3].

Lines that are perpendicular.

Lines that are not perpendicular.

References

1. McAdams, David E.. All Math Words Dictionary, perpendicular. 2nd Classroom edition 20150108-4799968. pg 137. Life is a Story Problem LLC. January 8, 2015. Buy the book
2. Keller, Samuel Smith. Mathematics for Engineering Students, Plane and Solid Geometry. pp 3, 64-65. www.archive.org. D. Van Nostrand Company. 1908. Last Accessed 12/3/2018. http://www.archive.org/stream/mathengineer00kellrich#page/5/mode/1up/search/perpendicular. Buy the book
3. Casey, John, LL.D., F.R.S.. The First Six Books of the Elements of Euclid. pg 7. Translated by Casey, John, LL.D. F.R.S.. www.archive.org. Hodges, Figgis & Co.. 1890. Last Accessed 12/3/2018. http://www.archive.org/stream/firstsixbooksofe00caseuoft#page/7/mode/1up/search/perpendicular. Buy the book

More Information

• McAdams, David E.. Line. allmathwords.org. All Math Words Encyclopedia. Life is a Story Problem LLC. 3/12/2009. https://www.allmathwords.org/en/l/line.html.

Cite this article as:

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

Image Credits

• All images and manipulatives are by David McAdams unless otherwise stated. All images by David McAdams are Copyright © Life is a Story Problem LLC and are licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.

Revision History

12/21/2018: Reviewed and corrected IPA pronunication. (McAdams, David E.)
12/1/2018: Removed broken links, updated license, implemented new markup. (McAdams, David E.)
12/21/2009: Added "References". (McAdams, David E.)
9/2/2008: Expanded 'More Information'. (McAdams, David E.)
7/12/2007: Initial version. (McAdams, David E.)