PI R SQUARED
YOUR LINK HERE:
http://youtube.com/watch?v=0S1yUkpxE9w
TeacherTube User: jamsullivan • TeacherTube URL: http://www.teachertube.com/viewVideo.... • This is a math video lesson to help you with new math, math tricks, and or simple math questions you may have. • This video provides an informal proof of the formula for the area of a circle pi times the radius squared. There is no audio at the present time. All of the necessary text and diagrams are on the screen.
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