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Search: Posts Made By: TomCowley
Forum: Science, Math, and Philosophy 08-06-2007, 09:43 PM
Replies: 1
Views: 78
Posted By TomCowley
Re: Circle Geometry re-visited .

http://www.cut-the-knot.org/triangle/RelationsInTriangle.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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