The Golden Ratio (why it is so irrational) – Numberphile

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Note on this video: Ben uses “one over a number” quite often during the video to make a fraction of a turn between 0 and 1, but the same effects apply if you turn more than a complete turn (e.g. sqrt(2) = approximately 1.414… of a turn, i.e. 1 whole turn and 0.414… of a further turn).

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