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Aug 29, 2016 at 16:13 comment added Goldstern They only defined the notion of "general" for acute triangles. You must remember that this proof is from the 20th century, when suffrage was limited to cis-90 triangles.
Aug 5, 2016 at 23:12 comment added Steven Landsburg The stated theorem is clearly false. General triangles (as defined here) include, among many others, 105/70/5, 105/65/10, and 75/60/45.
May 13, 2014 at 12:08 comment added Joachim Breitner There is a formal, machine-verified proof of this theorem at afp.sourceforge.net/entries/General-Triangle.shtml
May 3, 2013 at 7:25 history edited Goldstern CC BY-SA 3.0
typo
Apr 25, 2013 at 19:56 vote accept CommunityBot
Apr 25, 2013 at 19:08 vote accept CommunityBot
Apr 25, 2013 at 19:56
Apr 25, 2013 at 15:45 history edited Goldstern CC BY-SA 3.0
quadrilateral
Apr 25, 2013 at 15:40 history answered Goldstern CC BY-SA 3.0