Image:Ptolemy Pentagon.svg
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Ptolemy_Pentagon.svg (526 × 526 pixel, file size: 10 KB, MIME type: image/svg+xml)
[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.
[edit] Licensing
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- (del) (cur) 00:31, 29 August 2006 . . Dicklyon (Talk | contribs) . . 526×526 (10,712 bytes) (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.)
- (del) (rev) 00:26, 29 August 2006 . . Dicklyon (Talk | contribs) . . 744×1052 (10,535 bytes) (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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