Orthocenter
Pronunciation: /ˈɔrθ.oʊˌsɛn.tər/ Explain
Click on the blue dots and drag them to change the figure.
Is it possible to change the figure so that the orthocenter is outside of the triangle? Why?
 Manipulative 1  Orthocenter Created with GeoGebra. 

The orthocenter of a
triangle
is the point where the
altitudes
of the triangle
coincide.
The orthocenter may on the interior the triangle, on the
boundary
of the triangle or on the exterior of the triangle.
Discovery
 For what class of triangle is the orthocenter on the interior of the triangle?
 For what class of triangle is the orthocenter on the boundary of the triangle?
 For what class of triangle is the orthocenter on the exterior of the triangle?

References
 McAdams, David E.. All Math Words Dictionary, orthocenter. 2nd Classroom edition 201501084799968. pg 132. Life is a Story Problem LLC. January 8, 2015. Buy the book
Cite this article as:
McAdams, David E. Orthocenter. 12/21/2018. All Math Words Encyclopedia. Life is a Story Problem LLC. http://www.allmathwords.org/en/o/orthocenter.html.
Image Credits
Revision History
12/21/2018: Reviewed and corrected IPA pronunication. (
McAdams, David E.)
9/5/2018: Removed broken links, updated license, implemented new Geogebra protocol, implemented new markup. (
McAdams, David E.)
8/7/2018: Changed vocabulary links to WORDLINK format. (
McAdams, David E.)
12/21/2009: Added "References". (
McAdams, David E.)
12/30/2008: Initial version. (
McAdams, David E.)