document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1207756>Question 1207756</A>: <I><SPAN STYLE=\"word-break: break-all;\"> In tetrahedron ABCO,angle AOB = angle AOC = angle BOC = 90degree.A cube is inscribed in the tetrahedron so that one of its vertices is at O,and the opposite vertex lies on face ABC.Let a = OA, b = OB,and c = OC.$ Show that the side length of the cube is<BR>\n" );
document.write( "abc/(ab + ac + bc) </SPAN>\n" );
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