CK-12 Geometry-Concepts

http://www.ck12.org Chapter 1. Basics of Geometry

1.3 Congruent Angles and Angle Bisectors

Here you’ll learn how to find unknown values using the definitions of angle congruency and angle bisector. You’ll
also learn how to construct an angle bisector.

What if you knew that an angle was split exactly in half? How could you use this information to help you solve
problems? After completing this Concept, you’ll be able to bisect an angle and solve problems related to angle
bisectors.

Watch This

MEDIA

Click image to the left for use the URL below.

URL: http://www.ck12.org/flx/render/embeddedobject/52584

CK-12 Foundation: Chapter1CongruentAnglesandAngleBisectorsA

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URL: http://www.ck12.org/flx/render/embeddedobject/1271

James Sousa: Angle Bisectors

Watch the first part of this video.

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Click image to the left for use the URL below.

URL: http://www.ck12.org/flx/render/embeddedobject/1272

James Sousa: Angle Bisector Exercise2

Guidance

When two rays have the same endpoint, an angle is created.