Line segment
From Wikinfo
In mathematics, a line segment is a part of a line that is bounded by two end points. See also interval (mathematics).
When the end points both lie on a circle, a line segment is called a chord. When they are both vertices of a polygon, it is an edge if they are adjacent vertices, and otherwise a diagonal.
The midpoint of a line segment is the 'middle' point: the unique point at an equal distance from the two end points.
References
- Adapted from the Wikipedia article, "Line_segment" http://en.wikipedia.org/wiki/Line_segment, used under the GNU Free Documentation License
