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    Re: Mathematics Question
    From: Robert Eno
    Date: 2006 Mar 30, 00:33 -0500

    Thanks Herbert,
    
    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.
    
    Thanks,
    
    Robert
    
    ----- Original Message -----
    From: "Herbert Prinz" 
    To: 
    Sent: Thursday, March 30, 2006 12:10 AM
    Subject: Re: Mathematics Question
    
    
    > Robert Eno wrote:
    >
    >> Given that a segment of a circle is called an "arc", can anyone tell
    >> me what its two-dimensional equivalent on a sphere is called?
    >
    > Solid angle. The unit is steradian (or square-degree, if you must. You
    > get extra credit for saying it in German without stumbling:
    > "Quadratgrad").
    >
    > If you google these phrases you will find more details.
    >
    > Herbert
    
    
    

       
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