There are four types of line segments: open, closed and semi open (or semi-closed).
With an open line segment, neither end-point is included. In terms of inequalities, it would be of the form a < x < b.
Closed segment: both end-points are included so that a ≤ x ≤ b.
Semi-open, one end-point is included, the other is not.
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line segment
a line can be indefinitely extended but a line segment is a part. a line segment cannot be extended:)
Bisect a segment is to divide the line segment into 2
A line segment has end points
In geometry a line is thought of as extending infinitely in both directions. A line segment is part of a line.