Angle Bisectors: Lesson (Basic Geometry Concepts)

Here you'll learn what an angle bisector is as well as the Angle Bisector Theorem, which states that if a point is on the bisector of an angle, then the point is equidistant from the sides of the angle.

This video provides the student with a walkthrough on angle bisectors.

This is part of CK-12’s Basic Geometry: Triangle Relationships. See more at:

1. Midsegment Theorem:

2. Perpendicular Bisectors:

3. Angle Bisectors in Triangles:

4. Medians:

5. Altitudes:

6. Comparing Angles and Sides in Triangles:

7. Triangle Inequality Theorem:

8. Indirect Proof in Algebra and Geometry: