The Golden Ratio

The Golden Ratio is a constant factor that when multiplied by any number x to obtain number y, then y multiplied by the Golden Ratio is equivalent to x + y. It has many applications, most interestingly in arts and aesthetics. The ratio itself is an irrational number, approximate to 1.6180339887. The puzzle today is a golden rectangle.
See Also: http://en.wikipedia.org/wiki/Golden_ratio

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