document.write( "Question 1117513: A spherical triangle on a sphere has an area of 419 sq.m. Find the radius of the sphere if the spherical excess of the triangle is 60 degrees. \n" ); document.write( "

Algebra.Com's Answer #732620 by ikleyn(52787) $\"\"$ $\"About$

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document.write( "On a sphere of a radius R, the spherical area of a triangle \r\n" );
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document.write( "Spherical Area = ,\r\n" );
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document.write( "where A, B and C are spherical angles of the triangle in radians and the value    is called  \r\n" );
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document.write( "\"the spherical excess of the triangle\"  (see the link  http://mathworld.wolfram.com/SphericalTriangle.html ).\r\n" );
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document.write( "So, from the given data,   =  =  = 400.3185.\r\n" );
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document.write( "Therefore, the radius of the sphere is about   = 20 meters.\r\n" );
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