Learn the difference between lines, line segments, and rays. Created by Sal Khan.

Review the basics of lines, line segments, and rays. Identify and draw lines, line segments, and rays in practice problems.

Unit 1: Lines About this unit Learn what lines, line segments, and rays are and how to use them.

In this example of measuring a line segment, the numbers span across the positive and negative. Remember, line segments and points are the foundations of geometry, so this is an important concept.

In everyday language, you might call it a line, but we'll call it a line segment, 'cause we'll see when we talk in mathematical terms, a line means something slightly different.

Learn how to use the midpoint formula to find the midpoint of a line segment on the coordinate plane, or find the endpoint of a line segment given one point and the midpoint.

The line over the letters AB means "line segment". It is the distance between points A and B.

This video provides an interactive exercise that emphasizes the significance of accurate definitions, helping learners develop their mathematical communication skills and enhance their grasp of geometry.

Find the midpoint of a segment on the coordinate plane, or find the endpoint of a segment given one point and the midpoint.

As you can see for yourself, the pre-image and the image are both line segments with the same length. This is true for any line segment that goes under any translation.