Segment Command

This command differs among variants of English:

Interval (Aus)
Segment (UK + US)

Segment( <Point>, <Point> ): Creates a segment between two points.
Segment( <Point>, <Length> ): Creates a segment with the given starting point and length, as well as the end point of the segment.

When computing intersections with other objects, only intersections lying on the segment are considered. To change this, you can use Outlying Intersections option.
See also Segment and Segment_with_Given_Length tools.