Find the Circumference of a Circle

This Find the Circumference of a Circle video also includes:

Solving for circumference is an easy as one, two, pi! Show your learners what pi is and how to use it in an equation. This second video in a series uses the circumference and the radius as a ratio to show that 3.14 is a constant in these relationships. While the video only demonstrates one example, use the Slides for more practice problems. Note that the video lesson only asks for answers in terms of pi, but the quiz in the Slides asks for the answer as a decimal and in terms of pi. Use later videos for more practice with area and circumference.

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CCSS: Designed
Classroom Considerations

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  • Reviews the different pieces of a circles and their equations 
  • Identifies pi as a constant of proportionality
  • Notes template provided

  • Only uses circumference formula with radius, not diameter
Common Core