Understand the difference in finding angle measures. A segment of an extensive geometry playlist introduces the formula to find the measure of an angle formed outside of a circle. Using examples, the video shows how to calculate measures of angles formed in different ways.

Concepts

circles, arcs, angles, tangent lines, secant

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Additional Tags

math

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Instructional Ideas

• Have class members create problems and share with classmates for practice
• Research the proofs of the angle outside a circle measurement

Classroom Considerations

• Requires the class to be able to solve linear equations

• This video is hosted on YouTube

Pros

• Includes a link to additional videos and practice problems
• Shows the algebraic steps in the work of the examples

Cons

• None

Common Core

HSG-C.A.2 MP2 MP3