Steve writes:
> > constructed by folding the larger size in half. The ratio of
> > the height to the width being the 'magic ratio',  square root 2 : 1.
>
> In case there's any confusion, the Fibonacci-related "Golden Ratio",
> a.k.a. "Golden Section", "Golden Mean", "Divine Proportion" etc., is
> unrelated to sqrt(2); its value is 0.5*(sqrt(5)-1).

More than you want to know:

   http://mathworld.wolfram.com/GoldenRatio.html
   http://functions.wolfram.com/Constants/GoldenRatio/

G.

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