<!doctype html public "-//W3C//DTD W3 HTML//EN"> <html><head><style type="text/css"></style><title>Geometry [was Re: Inertia...etc]</title></head><body> <div>At 17:17 -0700 30/9/08, David Andersen wrote:</div> <div><br></div> <blockquote type="cite" cite>...I'll read the article and probably still be in the dark if there's any more than 6th grade algebra involved.</blockquote> <div><br></div> <div>I'd guess it might be a good idea to look at the <a href="http://en.wikipedia.org/wiki/Law_of_cosines">Law of Cosines</a> in preparation.</div> <div><br></div> <div>JD</div> <div><br></div> </body> </html>