A line divided into two unequal parts that have ratios stated as: the ratio of the smaller part (‘a’) to the larger part (‘b’) is the same ration as the larger part to the whole line (a : b = b: (a + b)). Named ‘golden’ by the Renaissance era artists, because of its visually satisfying symmetry, who thought this ratio as divinely proportioned. The segment resulting from this ratio, of 21:34 or 1:1.618, was called ‘the section’ by the ancient Greeks. The Greeks proportioned the Pantheon and other structures by this ratio. Also refer to Fibonacci series .
Black’s Law Online Dictionary
