Question: 4. Given A(1,2,3), B(3,2,6) and C (4, -3, -2) determine: (9 marks) (a) the angle at A (b) the area of AABC (c) if D

4. Given A(1,2,3), B(3,2,6) and C (4, -3, -2) determine: (9 marks) (a) the angle at A (b) the area of AABC (c) if D (3,0,1) is coplanar with A, B and C

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