Thales' theorem: Revision history

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15 November 2014

6 December 2013

  • curprev 19:0319:03, 6 December 2013en>Lchris314m 10,230 bytes +10,230 Proved AB and BC are perpendicular by evaluating the product of their slopes and show that it is -1, rather than letting the product be -1 in the first place.

17 August 2012