Image:Ptolemy sine proof.svg

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Ptolemy_sine_proof.svg‎ (SVG file, nominally 460 × 460 pixels, file size: 2 KB)

[edit] Summary

Description	France Geometric representation for the Ptolemy's theorem: if a quadrilateral is inscribed in a circle then the sum of the products of its two pairs of opposite sides is equal to the product of its diagonals. Proof using the Law of Sines.
Source	self-made, vectorized version.
Date	30 March 2008
Author	User:Verdy P
Permission (Reusing this image)	See below.
Other versions	Image:Ptolemy sine proof.jpg

[edit] Licensing

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.

File history

Click on a date/time to view the file as it appeared at that time.

	Date/Time	Dimensions	User	Comment
current	23:05, 30 March 2008	460×460 (2 KB)	Verdy P (Talk \| contribs)	("font-size:0.8em" does not work either in MediaWiki's SVG renderer, use absolute sizes (and relative dy offsets for tspan) in pixels. )
	23:02, 30 March 2008	460×460 (2 KB)	Verdy P (Talk \| contribs)	(fix for "font-size:80%" bug in Mediawiki's SVG renderer (it should be "0.8em", relative to current font-size, but not to document size!))
	22:57, 30 March 2008	460×460 (2 KB)	Verdy P (Talk \| contribs)	(compacted manually)
	21:27, 30 March 2008	460×460 (21 KB)	Verdy P (Talk \| contribs)	(== Summary == {{Information \|Description=Geometric representation for the Ptomely's theorem: the product of the two diagonal lengths equals the product of each pair of opposed sides. \|Source=self-made \|Date=30 March 2008 \|Location=France \|Author=[[Use)