Proving the Area of a Disk

Using a similar process from the first lesson plan in the series of finding area approximations, a measurement resource develops the proof of the area of a circle. The problem set contains a derivation of the proof of the circumference formula. 

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CCSS: Designed
Instructional Ideas

  • Consider using a geometry sketching application to create the figures
  • Have different groups determine the areas of the inscribed and circumscribed polygons and create a large class chart with the measurements
Classroom Considerations

  • Limit notation and concept may be unfamiliar to some
  • The fourth lesson in a 14-part series
Pros

  • The resource provides scaffolding suggestions throughout
  • Exit ticket contains sample solutions
Cons

  • None
Common Core