Image:Ptolemy Pentagon.svg

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Ptolemy_Pentagon.svg‎ (SVG file, nominally 526 × 526 pixels, file size: 10 KB)

[edit] Summary

Application of Ptolemy's theorem to the quadrilateral made by removing a vertex from a regular pentagon yields b/a = phi, the golden ratio. This drawing illustrates it.

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	Date/Time	Dimensions	User	Comment
current	00:31, 29 August 2006	526×526 (10 KB)	Dicklyon (Talk \| contribs)	(Application of Ptolemy's theorem to the quadrilateral made by removing a vertex from a regular pentagon yields b/a = phi, the golden ratio. This drawing illustrates it.)
	00:26, 29 August 2006	744×1,052 (10 KB)	Dicklyon (Talk \| contribs)	(Application of Ptolemy's theorem to the quadrilateral made by removing a vertex from a regular pentagon yields b/a = phi, the golden ratio. This drawing illustrates it.)