The Area of a Circle

Introduce learners to two methods to estimate the formula for the area of a circle. The first method uses sector of a circle to form a rectangle and the other uses grids to estimate the area. The problems in the 18th segment of a 28-part series require pupils to find the area of circles in mathematical situations.

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CCSS: Designed
Additional Tags
Instructional Ideas
  • Lead a discussion about the approximate values and exact values
Classroom Considerations
  • Class members need to know how to translate verbal descriptions into pictures
  • Prepare circles that are divided into 16 segments
Pros
  • Includes scaffolding suggestions
  • Contains solutions for the problems
Cons
  • Answers for questions involving fractions are given as decimals
Common Core