3 Matching Annotations
  1. Dec 2023
  2. web.archive.org web.archive.org
    Thread about information cards
    1
    1. chrisaldrich 27 Dec 2023
      It was written in a book that 5x3 cards have an aspect ratio close to the golden ratio (1.618) .

      https://web.archive.org/web/20060422014759/http://that4.2ch.net/test/read.cgi/stationery/1021438965/l50

      3 x 5" index cards golden ratio
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    web.archive.org/web/20060422014759/http://that4.2ch.net/test/read.cgi/stationery/1021438965/l50
  3. Mar 2022
  4. mathshistory.st-andrews.ac.uk mathshistory.st-andrews.ac.uk
    Golden ratio
    1
    1. devinberg 27 Mar 2022
      about 0.6180340

      Found on pg. 144 of this document: http://publikationen.badw.de/de/002334747

      Also, noted in this annotation: https://hypothes.is/a/7p6ymq4VEeypdGs_FAN43w

      math history Kepler Golden Ratio
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    mathshistory.st-andrews.ac.uk/HistTopics/Golden_ratio/
  5. publikationen.badw.de publikationen.badw.de
    BAdW · 002334747
    1
    1. devinberg 27 Mar 2022
      618034

      "The first known calculation of the golden ratio as a decimal was given in a letter written in 1597 by Michael Mästlin, at the University of Tübingen, to his former student Kepler. He gives "about 0.6180340" for the length of the longer segment of a line of length 1 divided in the golden ratio." from https://mathshistory.st-andrews.ac.uk/HistTopics/Golden_ratio/

      math Golden Ratio Kepler
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    publikationen.badw.de/de/002334747/pdf/CC BY