calculus

There is a shape
first a regular triangle inscribed in a circle, and inscribed in a square, inscribed in a circle, inscribed in a pentagon, etc.
so polygon circle polygon circle, etc. the radius of the first circle is 1, find an equation for radius n.
number 2:give an argument that lim as x-infinity of r subscript n has an upper bound, or if you think it doesn't, why.
I'm not sure where to start and how to do this problem
Thanks.

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asked by Andre
  1. You could start here:

    http://www.mathopenref.com/polygonincircle.html

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    posted by Steve

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