The Golden Mean - Proportion /4

If you compared the two parts of the divided line or two sides of the favourite rectangle
(On previous page) you would find that the longer is approximately 1.618 times as long as the shorter.
In other words the ratio between them is 1.618:1.

This ratio may be written as 1.618, a number which has many fascinating qualities first noticed by Euclid, the father of modern geometry, about the year 300 B.C. It has always been considered an important number: mathematicians have given it the name (pronounced fie); the artists of the Renaissance called it the Divine Proportion; the Greeks used the pentagon, which includes a number of relationships, as a holy symbol.