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Math Help - [SOLVED] Simple Radian Question

  1. #1
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    [SOLVED] Simple Radian Question

    this is probably a very stupid question but how is there 180/pi radians in a circle when one radian is found where the angles circumference arc is equal the radius??

    what i mean is, if you look at this image where 1 radius is calculated, id does not look as though there would be 57 radians (180/pi) around this circle but more like 7 point something...
    http://mathworld.wolfram.com/images/...Radian_700.gif


    thanks in advance
    Last edited by whatever; October 6th 2008 at 03:14 PM. Reason: SOLVED
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  2. #2
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    There are not \frac{180}{\pi} radians in a circle.

    \frac{180}{\pi} is a conversion rate between radians and degrees.

    There are 2\pi radians in a circle; try reading about them here: Radian - Wikipedia, the free encyclopedia

    It might also help to see a problem using them: http://www.mathhelpforum.com/math-he...e-measure.html

    Let us know if you need more of an explanation.
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  3. #3
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    makes sense now, cheers
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