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The golden spiral is a logarithmic spiral that grows outward by a factor of the golden ratio for every 90 degrees of rotation (pitch angle about 17.03239 degrees). It can be approximated by a "Fibonacci spiral", made of a sequence of quarter circles with radii proportional to Fibonacci numbers.
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Date/Time Dimensions User Comment 2006-10-05 05:08: 988×611× (12078 bytes) Dicklyon: Heavier strokes on spiral so it will show up without being so big.
This phyllotactic pattern creates an optical effect of criss-crossing spirals. In the botanical literature, these designs are described by the number of counter-clockwise spirals and the number of clockwise spirals. These also turn out to be Fibonacci numbers. In some cases, the numbers appear to be multiples of Fibonacci numbers because the ...
english: Series of Golden triangle and the Fibonacci spiral; italinao: la seria di triangoli aurei con esplicitazione della spirale di Fibonacci; Date: 09 - 10 - 2007: Source: Own work: Author: Personline
English: Fibonacci Spiral generated with the free software GeoGebra. Date: 22 May 2009: Source: Own work: Author: Raiana Tomazini: Licensing. Public domain Public ...
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Date/Time Thumbnail Dimensions User Comment; current: 22:19, 22 April 2013: 915 × 579 (1 KB): Ysangkok: rsvg doesn't support stylesheets, use groups: 22:13, 22 April 2013