yes it has with fibbonarchi and Leonardo davinchi
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infinitely many - the golden ratio is an irrational number
The common belief is that the Greeks used the golden ratio (~1.618) for the relation between a building's length and its height. Mario Livio, who wrote a book on the golden ratio, claims that these ratios are actually somewhere between 1.4 and 2.0, so that may have been a myth.
The Greeks
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No, A4 paper is not an example of the golden ratio. The golden ratio is a mathematical ratio of approximately 1.618:1, often found in art, architecture, and nature. A4 paper has dimensions of 210 mm × 297 mm, which do not align with the golden ratio. The aspect ratio of A4 paper is 1:√2, which is based on the ISO 216 standard for paper sizes.