#0, Desargues' Theorem
Posted by Don Johnson on Apr-23-09 at 12:22 PM
After numerous hours of searching I am unable to find a simple proof of this theorem; not a 3D analogy, but an actual proof. Some sites I have visited have even said it was an axiom. Hopefully someone here can shed some light on the subject and tell me how, if possible, I can prove this theorem. Thanks in advance.
#1, RE: Desargues' Theorem
Posted by alexb on Apr-23-09 at 09:39 PM
In response to message #0
>After numerous hours of searching I am unable to find a
>simple proof of this theorem; not a 3D analogy, What I have at http://www.cut-the-knot.org/Curriculum/Geometry/Desargues.shtml is not an analogy, although it does have a 3d outlook. I placed an additional proof (from Menelaus' theorem) immediately after that.
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