This space is for community interaction. Solutions posted here are provided by our visitors.
Friday, December 26, 2008
Classical Theorems
Index Pythagorean theorem, Heron, Ptolemy, Brahmagupta, Menelaus, Ceva, Nine Point Center, Theaetetus, Euler's Polyhedron, Pascal, Pappus, van Aubel, Eyeball, Butterfly, and more.
For a triangle, suppose the two tangent lines drawn from a point of the circumscribed circle to the inscribed circle intersect the circumscribed circle at P and Q, then show that the line PQ is tangent to the inscribed circle.
Hi antonio, here is a audiovisual proof for several theorems in your site:
ReplyDeletehttp://www.youtube.com/watch?v=RKZNLmItGsU&list=PL2CC49A548527528B&feature=plpp_play_all
For a triangle, suppose the two tangent lines drawn from a point of the circumscribed circle to the inscribed circle intersect the circumscribed circle at P and Q, then show that the line PQ is tangent to the inscribed circle.
ReplyDelete