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Topic: hi,friends(6)
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China -->hk

Posts: 43
Registered: 1/23/07
Posted: Dec 15, 2007 3:37 AM
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Dear friend:
can you help me?
what is the volume of a '3-sphere_pyramid'(that is: with 3 points A,B,C on the surface of a sphere of radius R and the vertex O is the center of the sphere) with angle<OA,OB>=al(alpha),angle<OB,OC>=be(beta),angle<OC,OA>=ga(gamma)? And,how you deduce it out?
As we know the spherical wedge(lune) has the volume: v=2*R^3*theta/3.

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