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 Related Terms
 Segment:  The part of a line between two points on the line. Sometimes referred to as a line segment.
Endpoint: The point at an end of a line segment.
Length: The distance between two ends of a line segment.
Line Segment: The part of a line between two points on the line. Sometimes referred to as a segment.
Midpoint: The point on a line segment that divides it into two equal parts.
Segment Bisector: A point, segment, line, or plane that divides a line segment into two equal parts.
Line: One of the basic undefined terms of geometry. A line has no thickness but its length goes on forever in two directions.
Ray: A ray begins at a point and goes on forever in one direction.