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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
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.
A Fibonacci spiral approximates the golden spiral using quarter-circle arcs inscribed in squares derived from the Fibonacci sequence. A golden spiral with initial radius 1 is the locus of points of polar coordinates ( r , θ ) {\displaystyle (r,\theta )} satisfying r = φ 2 θ / π , {\displaystyle r=\varphi ^{2\theta /\pi },} where φ ...
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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:
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Logarithmic spiral (also known as equiangular spiral) 1638 [4] = Approximations of this are found in nature Fibonacci spiral: Circular arcs connecting the opposite corners of squares in the Fibonacci tiling: Approximation of the golden spiral Golden spiral
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.