Math Calculations & Conversions : How to Calculate the Circumference of a Circle

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A simple formula for finding the circumference of a circle is two times pi times the radius. Calculate the distance around the outside of a circle in centimeters with tips from a math teacher in this free video math lesson.

Expert: Steve Jones
Bio: Steve Jones is an experienced mathematics and science teacher.
Filmmaker: Paul Volniansky
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makes much sence :D thanks it sunk in!

Bloodscalpr
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Got to love how these "eHow" guys find the most incompetent people there is. Pi is approximately 3?! I mean, come on, you say 3.14 at least!

madichelp