Edge
Pronunciation: /ɛdʒ/ Explain
 Figure 1: Edges of a geometric figure. 

 An edge of a 2dimensional geometric figure is the
boundary of the figure.^{[1]} The figure does
not extend beyond the boundary. The word 'edge' is usually used to refer
to a straight edge. However both 'edge' and 'boundary' can be used to
refer to a curve.
 An edge of a 3dimensional polyhedron is the line formed by the intersection of two faces.
 An edge of a network graph is a path joining two nodes.
A boundary may or may not be included in the object. When graphing,
a boundary that is not included in the object is
conventionally
drawn with a dotted line. A boundary that is included in the object
is conventionally drawn with a solid line.

References
 Stöcker, K.H.. The Elements of Constructive Geometry, Inductively Presented. pg 47. Translated by Noetling, William A.M, C.E.. www.archive.org. Silver, Burdett & Company. 1897. Last Accessed 8/6/2018. http://www.archive.org/stream/elementsofconstr00noetrich#page/47/mode/1up. Buy the book
Cite this article as:
McAdams, David E. Edge. 7/9/2018. All Math Words Encyclopedia. Life is a Story Problem LLC. http://www.allmathwords.org/en/e/edge.html.
Image Credits
Revision History
7/5/2018: Removed broken links, updated license, implemented new markup, implemented new Geogebra protocol. (
McAdams, David E.)
8/5/2010: Added edge of a polyhedron and edge of a network graph. (
McAdams, David E.)
12/31/2009: Added "References". (
McAdams, David E.)
12/17/2008: Initial version. (
McAdams, David E.)