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    Re: Mathematics Question
    From: Herbert Prinz
    Date: 2006 Mar 30, 02:38 -0500

    Robert Eno wrote:
    
    > Just to make sure I got this right, please have a look at the diagram
    > on the
    > following website:
    >
    > http://whatis.techtarget.com/definition/0,,sid9_gci528813,00.html
    >
    > Is the lens-shaped figure in red called a steradian or does this term
    > refer
    > only to the cone shaped figure in the centre of the sphere?  I am looking
    > for the name of the red lined shape.
    >
    >
    Robert,
    
    It appears that I misunderstood your question. You said "arc" and I
    thought "angle". What you really wanted was the name for the curved
    surface of a spherical cap (i.e. the surface without the flat bottom),
    right? I am not sure whether there is a name for that, at least I am not
    aware of  any.
    
    Herbert
    
    
    

       
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