Segment Bisector: Definition & Example

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• 0:01 What Is a Segment Bisector?
• 0:46 Examples
• 1:19 Facts
• 2:31 Lesson Summary

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Lesson Transcript
Instructor: Beverly Maitland-Frett

Beverly has taught mathematics at the high school level and has a doctorate in teaching and learning.

This lesson explains types of segment bisectors and demonstrates examples of segment bisectors. We will also review the definitions of some key vocabulary words.

What Is a Segment Bisector?

A line segment has two endpoints; that is, it has a starting point and an ending point, much like a dead-end street. Bisector means to divide, not just in two, but in halves, or two equal parts. Therefore, a segment bisector is a point, a line, a ray, or a line segment that bisects another line segment. Let's quickly review. A point is a position in space. A line continues forever in both directions. A line segment has two endpoints, as we already stated. A ray has one endpoint and continues forever in the other direction.

Examples of Segment Bisectors

Let's look at some specific examples of different types of segment bisectors. Here is a segment bisecting a segment. You can see that segment CD bisects AB:

Here's one of a ray bisecting a segment. In this one, ray MN bisects segment AB:

A line can also bisect a segment. Line PQ is bisecting segment AB:

Even a point can bisect a segment. In the below image, point M bisects segment AB:

Facts about Segment Bisectors

There are some things to note about segment bisectors. Let's go through some facts about them that are important to recognize in working with segment bisectors.

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