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已知正四棱柱oabcd的体积 (2013?黄浦区二模)已知正四棱柱ABCD-A
已知正四棱柱ABCD-A 设正四棱柱ABCD-A1B1C1D1的底面正方形ABCD的边长为x,∵正四棱柱ABCD-A1B1C1D1的高为22,外接球的体积是32π3,∴外接球半径r=2,2x2+(22)22=2,解得x=2.设球心为O,则△...
已知正四棱柱ABCD-A 设正四棱柱ABCD-A1B1C1D1的底面正方形ABCD的边长为x,∵正四棱柱ABCD-A1B1C1D1的高为22,外接球的体积是32π3,∴外接球半径r=2,2x2+(22)22=2,解得x=2.设球心为O,则△...