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Formula for Surface Area of a Sphere: Video IIII (Tanton: Mathematics)

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Uploaded by on May 4, 2011

In this fourth video of "geometry formulas explained" we show how Archimede's deduced that the surface area of a sphere is 4*pi*r^2 after having figured a formula for its volume. (And that was video III.)

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Education

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Uploader Comments (DrJamesTanton)

  • @DrJamesTanton

    I don't know the history of these proofs. What I've seen done is the SA formula used to derive the V formula. But, what you've done is the other way around. Which approach is how the formulas developed in history?

  • @wadams19 I believe Archimedes first deduced the V of a sphere, and then got the SA from that.

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  • im in 7th grade and my teacher wanted us to learn the formulas for SA ans V so he gave us a paper with all t he formulas on it but of course i lost it so now im stuck looking up things like this online

  • i am in year 7 and i forced into doing this by my teacher

  • it looks like a retarded cupcake.

  • thanks for the explanation!

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