What Are Line Segment, Endpoints, And Midpoint In Geometry?

What Are The Definitions Of Line Segment, Endpoint, And Midpoint?

• A Line Segment occupies the distance between two Points called Endpoints.
  
• A Line Segment is a fixed length.
• A Line Segment has length but no width or height.
• The exact center of a Line Segment is called the Midpoint.
• Is there a standard way of writing an line segment as a mathematical expression? Yes. There are two ways to express a line segment:

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  XY   OR  YX