Introduction to Point, Ray, Line and Line-Segment This lesson explains the concept of Points, Rays, Lines and Line-Segments. We will develop basic understanding of their properties and their measurement. Share this:Click to share on Facebook (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on Google+ (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Reddit (Opens in new window)