More on Golden Ratio in math: Wolfram: http://mathworld.wolfram.com/GoldenRatio.html http://mathworld.wolfram.com/GoldenRatio.html Geometry: http://www.cut-th

More on Golden Ratio in math: Wolfram: http://mathworld.wolfram.com/GoldenRatio.html http://mathworld.wolfram.com/GoldenRatio.html Geometry: http://www.cut-the-knot.org/do_you_know/GoldenRatio.shtml http://www.cut-the-knot.org/do_you_know/GoldenRatio.shtml which includes the beautiful identity φ : 1 = 1 : (φ - 1)