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Credit CardsCredit cards are in the shape of a Golden RectangleIf you ever need an easily accessible example of a golden rectangle illustrating the proportions of the golden section, all you need do is to pull out a credit card or drivers license.
Standard sized credit cards are 54mm by 86mm, creating a ratio of 0.628, less than a millimeter off from a perfect golden section of 0.618, the reciprocal of 1.618.
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