Strike a chord with your classes! Use the video to demonstrate the relationship between intersecting chords in a circle. The instructor includes an example that involves a quadratic equation and extraneous solution. 

Concepts

chords, radius, circles, segments, angles, geometric properties, quadratic equations

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Additional Tags

math

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Instructional Ideas

• Create a set of practice problems for learners to apply the relationships taught in the video
• Have pupils record examples of intersecting chord relationships; compare them to the relationships with tangent and secant lines

Classroom Considerations

• Assumes proficiency with solving linear and quadratic equations
• The 20th lesson in the 40-part series

• This video is hosted on YouTube

Pros

• All three examples remain on the screen throughout the lesson to allow for reference and comparison

Cons

• Does not include context within problems to practice the new concept, which also makes it less engaging

Common Core

HSG-C.A.2