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Circles Around a Circle (Posted on 2013-08-07) Difficulty: 2 of 5

Circles C1, C2, ... Cn ( n≥3 and each with radius r ) are externally tangent
to a circle of radius R. Find the ratio r/R (in terms of n) if each of the
n circles is externally tangent to both of its neighbors.

See The Solution Submitted by Bractals    
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  Subject Author Date
another waybroll2013-08-08 01:33:44
SolutionNot on vacation (spoiler)Steve Herman2013-08-07 21:33:11
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