Discussion:  All Topics 
Topic:  What is a triangle? 
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Subject:  RE: What is a triangle? 
Author:  Mathman 
Date:  Jan 2 2005 
>Then we
> have nonEuclidean definitions, but I'm sure you mean Euclidean
> geometry here.
Let me temper that: The definition remains, it is the properties that chnage.
On the surface of the sphere angles of the spherical triangle do not add to 180
etc.. The figure is still closed and still defined by three points not on the
same arc.
David.
 
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