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Talk:Sum of angles of a triangle

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This is an old revision of this page, as edited by Pruss (talk | contribs) at 17:50, 11 November 2010 (←Created page with '== Reference to equivalence of parallel postulate and Pythagoras' theorem == The Pruss book cited (of which I am the author) is not a mathematics book. It would b...'). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.
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Reference to equivalence of parallel postulate and Pythagoras' theorem

The Pruss book cited (of which I am the author) is not a mathematics book. It would be better to have a citation to a mathematics book that has a proof of the claim. Pruss (talk) 17:50, 11 November 2010 (UTC)[reply]

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