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A tetrahedron has vertices at O(0, 0, 0), A(1, 2, 1), B(2, 1, 3) and C(-1,1, 2). Then the angle between the faces OAB and ABC will be |
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Answer» A tetrahedron has vertices at O(0, 0, 0), A(1, 2, 1), B(2, 1, 3) and C(-1,1, 2). Then the angle between the faces OAB and ABC will be |
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