golden section
A proportion in which the ratio of the whole to the larger part is the same as the ratio of the larger part to the smaller when a line is divided into two segments. The ratio is approximately 1.618. The reciprocal of 1.618 is approximately 0.618.

Proportions based on the golden section are believed to be eye-pleasing and can be found all around us in many paintings, buildings, and designs.

Related Term: ratio

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