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You are not logged in. #1 20140201 21:53:48
Gergonne triangle (fancy name from da wiki :D)Let the incircle of triangle ABC be tangent to sides and at D, E, and F, respectively. Prove that triangle DEF is acute.I just have no idea how to do this. I think I should find the angles in terms of the larger triangles angles, but I duno how... this thing is haaard. thanks!!! Batman shows Superman his new phone. Batman"Alfred, whats the temperature in London?" Alfred"Just a second, sir." Alfred turns on his iPhone."Siri, whats the temperature in London?" Siri  "Six centigrade." Alfred"Six centigrade sir." Batman"See?" #2 20140202 01:33:37
Re: Gergonne triangle (fancy name from da wiki :D)hi thedarktiger, You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei #3 20140203 20:49:01
Re: Gergonne triangle (fancy name from da wiki :D)thanks! Batman shows Superman his new phone. Batman"Alfred, whats the temperature in London?" Alfred"Just a second, sir." Alfred turns on his iPhone."Siri, whats the temperature in London?" Siri  "Six centigrade." Alfred"Six centigrade sir." Batman"See?" 