Question: 10. Solve for a if * = (-12,6, a) and D = (4, -2,4) are: a) Perpendicular b) Parallel12. A triangle is defined by the

 10. Solve for a if * = (-12,6, a) and D= (4, -2,4) are: a) Perpendicular b) Parallel12. A triangle is defined

by the points A(0, 1, 2), B(1, 0, 2) and C(-1, 2,0). Find angle A of this triangle. (4 marks)

10. Solve for a if * = (-12,6, a) and D = (4, -2,4) are: a) Perpendicular b) Parallel12. A triangle is defined by the points A(0, 1, 2), B(1, 0, 2) and C(-1, 2, 0). Find angle A of this triangle. (4 marks)

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