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Deriving the Formula For the Area of a Circle

Subject: Algebra, Geometry, Process Skills
Grade: 6-8, 9-12

Brief Description

Students work individually or in groups to derive the formula for the area of a circle.

Objectives

Learners form a rectangle by partitioning a circle and relate A = bh to A = pr2.

Keywords

area, height, length, perimeter, circumference, diameter, radius, sector

Materials Needed

Provide one of the following for each individual or group:

  • one large, heavy paper or cardboard circle, about 12 inches in diameter
  • scissors
  • rulers
  • colored markers or crayons.

    Lesson Plan

    See lesson Deriving the Formula For the Area of a Circle

    Assessment

    Teacher observes students at work on this project to determine success.

    Lesson Plan Source

    Submitted by: J. Sayraf , ([email protected]) South Lyon High School, South Lyon, Michigan


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    08/22/2000

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