Golden Section (Golden Ratio) is a proportion, in which a straight line (or a rectangle) is divided into two unequal parts in such a way, that the ratio of the smaller to the greater part is the same as that of the greater part to the whole figure (AB:BC=BC:AC)
Similar to the mathematical value pi, Golden Section cannot be expressed as a finite number, but an approximation of 0.618 : 1. This proportion has been known since antiquity (Euclid and Vitruvius discussed it) and has been said to possess inherent aesthetic value because of an alleged correspondence with the laws of nature or the universe. The claims have been supported by an immense quantity of data, collected both from nature and arts.
From the Golden Section, can form golden rectangles, which, when arranged continuously as in the following illustration will produce a spiral pattern, like a spiral pattern on the snail.
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