Edge
Pronunciation: /ɛdʒ/ ?
 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
 edge. http://wordnet.princeton.edu/. WordNet. Princeton University. (Accessed: 20110108). http://wordnetweb.princeton.edu/perl/webwn?s=edge&sub=Search+WordNet&o2=&o0=1&o7=&o5=&o1=1&o6=&o4=&o3=&h=.
 Stöcker, K.H.. The Elements of Constructive Geometry, Inductively Presented, pg 47. Translated by Noetling, William A.M, C.E.. Silver, Burdett & Company, 1897. (Accessed: 20091231). http://www.archive.org/stream/elementsofconstr00noetrich#page/47/mode/1up.
Cite this article as:
Edge. 20100805. All Math Words Encyclopedia. Life is a Story Problem LLC. http://www.allmathwords.org/en/e/edge.html.
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Revision History
20100805: Added edge of a polyhedron and edge of a network graph. (
McAdams, David.)
20091231: Added "References" (
McAdams, David.)
20081217: Initial version (
McAdams, David.)