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Circle Geometry re-visited .
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08-06-2007, 09:43 PM
TomCowley
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Join Date: Sep 2004
Posts: 354
Re: Circle Geometry re-visited .
http://www.cut-the-knot.org/triangle...ngle.shtml#p4R
Just a bunch of double-angle manipulations, really. It takes 10 seconds to derive r=abc/4Rp which is just as simple.
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