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    Re: Using any star for a lunar
    From: Herbert Prinz
    Date: 2005 Apr 6, 03:28 -0400

    Alexandre Eremenko wrote:
    
    >In spherical geometry, the sum of angles of a triangle
    >is NEVER 180. It is always more. The excess over 180 is essentially
    >the area of this triangle. So for small triangles is is close
    >to 180, as it should be, because they are approximately flat,
    >while for big ones it is much bigger.
    >For example, if you mark three arbitrary points on the equator,
    >you obtain a triangle whose three angles are 180 deg each.
    >
    >
    >
    >
    Or you may get a triangle in which the sum of the angles IS 180 degrees??
    
    Herbert Prinz
    
    
    

       
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