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Tool: Area of a Circle
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Go to: http://chuwm.tripod.com/gsp/index.html (opens a new window)
Description: This is a downloadable Geometer's Sketchpad file that illustrates the source of the area formula for a circle.
Technology Type: Sketchpad 
Author: Mr. Chu Wai Man
Language: English 
Cost: Does not require payment for use

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Courses: Geometry Circles

  gatita
Comment:Excellent to explain how to get the formula for the area of the circle. When I taught this concept I had only the model in paper to cut and the children did not understand how to do it and it did not make sense to them. This model is easier to understand.