Dihedral Angle
Pronunciation: /daɪˈhi.drəl ˈæŋ.gəl/ Explain
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Why do you think that the dihedral angle between two planes is never greater than 180 degrees?
 Manipulative 1  Dihedral Angle Created with GeoGebra. 

A dihedral angle is the angle formed by two intersecting
planes.
The Intersecting Planes Postulate tells us that
intersecting
planes form a line. Take a line in each plane that is
perpendicular
to the line of intersection. The two lines
must intersect. The dihedral angle of the planes is the angle between the two lines.

References
 McAdams, David E.. All Math Words Dictionary, dihedral angle. 2nd Classroom edition 201501084799968. pg 60. Life is a Story Problem LLC. January 8, 2015. Buy the book
Cite this article as:
McAdams, David E. Dihedral Angle. 12/21/2018. All Math Words Encyclopedia. Life is a Story Problem LLC. http://www.allmathwords.org/en/d/dihedralangle.html.
Image Credits
Revision History
12/21/2018: Reviewed and corrected IPA pronunication. (
McAdams, David E.)
7/4/2018: Removed broken links, updated license, implemented new markup, implemented new Geogebra protocol. (
McAdams, David E.)
1/23/2010: Added "References". (
McAdams, David E.)
7/10/2008: Changed manipulative from Sketchpad to GeoGebra. Added More Information (
McAdams, David E.)
5/7/2008: Initial version. (
McAdams, David E.)