Adjacent
Pronunciation: /əˈdʒeɪ sənt/ ?
Two features on a shape are adjacent if they are next to each other.^{[1]}
Adjacent parts of a polygon
Figure 1  Polygon 

In the polygon in figure 1:
 the angles A and B are adjacent,
 the sides g and h are adjacent, and
 angle A is adjacent to side g.
However,
 angle A is not adjacent to angle C,
 side g is not adjacent to angle D, and
 sides g and i are not adjacent.

Adjacent Angles on Intersecting Lines
 Figure 2: Adjacent angles on intersecting lines. 

Given two
intersecting
lines, two angles formed by the intersecting lines are adjacent if they are on the
same side of one of the lines.

Adjacent Arcs

Manipulative 3: Adjacent arcs. Click on the blue points and drag them to change the figure.


Two arcs of the same curve are adjacent if they share an endpoint.

Cite this article as:
Adjacent. 20101012. All Math Words Encyclopedia. Life is a Story Problem LLC. http://www.allmathwords.org/en/a/adjacent.html.
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Revision History
20101012: Added "Adjacent angles on intersecting lines" and "adjacent arcs" (
McAdams, David.)
20091224: Added "References" (
McAdams, David.)
20070712: Initial version (
McAdams, David.)