número áureo 21
1º_ It is a numerical value obtained from the proportional relationship between two segments, one minor and one major, and from the relationship of this with a form that contains them. You always get an irrational number, with infinite decimals and no period. 2º_ Name given in Athens to which it was exposed in public buildings indicating the year of the beginning of each period in which the lunar phases began to repeat on the same dates. It was written in gold, and hence its name. See number , golden .
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