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    Re: Spherical Trig
    From: Dan Allen
    Date: 2005 Apr 6, 08:44 -0600

    On Apr 5, 2005, at 7:59 PM, Bill wrote:
    
    > Focusing on the words "is between"
    > does that literally mean the lower limit can approach 180d and the
    > upper
    > limit approach 540d, or can the sums actual equal either 180d or 540d?
    
    The former in practice.  The limit goes to 180 but on any physical 3D
    surface it will never be 180, always greater (or less than 540).
    
    A sufficiently small triangle becomes flat and then the angles are like
    those in math textbooks - they equal 180 degrees.
    
    Dan
    
    
    

       
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