In mathematics and the arts, two quantities are in the golden ratio if the ratio between the sum of those quantities and the larger one is the same as the ratio between the larger one and the smaller. The golden ratio is approximately 1.6180339887 to one.

Throughout the history of architecture and in arts as well, the golden ratio is said to be visually pleasing. Consider the image below, which has been cropped to approximately 1:1.618, and I’m sure you will agree.

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Image: Recoil pad on my Remington 870 12 gauge security shotgun (close-up of the Rem Logo).