The radius of sphere =200mm.;centre(0,0,0)
The points are A (-95.6787,150.8944,-286.4617),B(123.2802,140.6448,-74.514),C(123.2802,-139.4520,-74.5147), D(-123.2802,-139.4520,-74.5147) but they are not accurate.
2006-10-02 21:39:29 · 2 answers · asked by j-11 1 in Science & Mathematics ➔ Mathematics
The question did not show itself completely.
The previous poster was slightly wrong. The solid angle for a complete sphere is 4pi, not 2pi. Essentially, the solid angle for a region is the area cut off on a sphere of radius 1.
2006-10-03 04:42:47 · answer #1 · answered by mathematician 7 · 0⤊ 0⤋
A full sphere subtends 2π steradians of solid angle. So calculate the area of the entire sphere (A = 4πr²), divide that into the area you have on the surface of the sphere, and multiply it by 2π to get the resultant solid angle.
Doug
2006-10-02 21:50:06 · answer #2 · answered by doug_donaghue 7 · 0⤊ 0⤋