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A circle of circles

  1. Oct 25, 2004 #1
    A circle with the radius R cuts the centers of circles with the radius r that does mearly touch eachother, What is the equation for the number of circles in the circle?
     
  2. jcsd
  3. Oct 25, 2004 #2

    Gokul43201

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    [tex]No.~of~circles,~n=[\frac{\pi}{sin^{-1}(r/R)}][/tex]

    where [ ] represents the greatest integer (or floor) function.
     
    Last edited: Oct 25, 2004
  4. Oct 27, 2004 #3
    Can you give a proof please?
     
  5. Sep 14, 2005 #4
    You cant? :rofl: And im too lazy to look it up at the library...
     
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