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Interactive video lesson plan for: Area of a circle, how to get the formula.

Activity overview:

Read a more complete explanation here: http://pythagoreanmath.com/complete-explanation-for-area-of-a-circle-formula/

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TedEd lesson at http://ed.ted.com/on/F3aawBcM

πr(squared) gives you the area of a circle, but where does it come from? Here is a simple explanation.

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