Arc Length

Don't let your classes feel like they are going in circles. The video lesson shows pupils how to apply a formula to finding the length of an arc defined along a circle. The instructor uses three different examples to illustrate the concept. 

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CCSS: Adaptable
Instructional Ideas

  • Have video available for a substitute teacher to access
  • Discuss the origin of the formula in the video
Classroom Considerations

  • Builds directly from the previous lesson in this 40-part series
Pros

  • Discusses variations in answers: decimal approximations, fraction approximations, and answers in terms of pi
Cons

  • Relies heavily on a formula rather than developing the concept of arc length
Common Core