Quadratic Equation

[shootingstar]

Dearie looked over my shoulder at the link: "That's trigonometry".

Now, uforgot should know, the math teacher.

But I looked at the link....the application would be what I learned in design layout for calligraphic work used by the medieval priest scribes. The formula gives the "golden mean" for the perfectly proportional rectangle within a rectangle. But we didn't use a mathematical formulae..just drawing straight lines, measuring off a border and running a line diagonally through the opposite ends of corners.

Or maybe I have poor memory. My notes are somewhere.

Perhaps Mimi's son can confirm that the golden mean is quadratic equation:
http://ezinearticles.com/?Golden-Pro...ean&id=3772732
http://www.goldenmeangauge.co.uk/

http://www.cyberspaceorbit.com/ironhart/goldensec.html