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Math Help - deriving the area and circumference of a circle

  1. #1
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    deriving the area and circumference of a circle

    Could anyone show me the proof for circle area and circumference. I saw a animated argument that give me the basic theory on circle area but it went to fast to get a firm understanding.
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  2. #2
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    Quote Originally Posted by manyarrows View Post
    Could anyone show me the proof for circle area and circumference. I saw a animated argument that give me the basic theory on circle area but it went to fast to get a firm understanding.
    What, precisely, are you seeking to have proved? What formula or relationship?

    What theorems, formulas, etc, are you allowed to use in your proof?

    Thank you!
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  3. #3
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    further explaination

    I have actually found the argument for the area of the circle. The one where you cut it up into tiny pieces and reassemble it as a square and then use the area of the rectangle r\pi\times r .

    My question now is how do we come up with the circumference of the circle. I'm not looking for a formal proof neccessarily, just a practical explanation.
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  4. #4
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    Quote Originally Posted by manyarrows View Post
    Could anyone show me the proof for circle area and circumference. I saw a animated argument that give me the basic theory on circle area but it went to fast to get a firm understanding.
    Read this: http://www.fiu.edu/~rudomine/pi.pdf
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