Intersecting Chords of Circles

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. 

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CCSS: Adaptable
Additional Tags
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
  • All three examples remain on the screen throughout the lesson to allow for reference and comparison
  • Does not include context within problems to practice the new concept, which also makes it less engaging
Common Core