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Area of a Circle – by Kevin Hoang

So, a friend of ours from the great state of California, Kevin Hoang, sent this really neat Geogebra demonstration that a student made. It shows the classic slicing up of a circle into sectors and then rearranging them into a parallelogram like figure.

This is an amazing demo if you are exploring informal limit ideas in Common Core Geometry (yes I went there) to derive classic measurement formulas.

Thanks Kevin!

Area of a Circle in Geogebra

Geogebra Area of Circle