# 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/

https://itunes.apple.com/us/app/euclids-elements-book-1/id717831746?ls=1&mt=8

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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Applying Scale Factors to Perimeter, Area, and Volume of Similar Figures

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