பன்னிருகோணம் (Tamil Wikipedia)

Analysis of information sources in references of the Wikipedia article "பன்னிருகோணம்" in Tamil language version.

refsWebsite

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2books.google.com

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books.google.com

Plane Geometry: Experiment, Classification, Discovery, Application by Clarence Addison Willis B., (1922) Blakiston's Son & Company, p. 249 [1]
Elements of geometry by John Playfair, William Wallace, John Davidsons, (1814) Bell & Bradfute, p. 243 [2]

wolfram.com

demonstrations.wolfram.com

See also Kürschák's geometric proof on the Wolfram Demonstration Project