Question 3

Verify the following: (i) (0, 7, -10), (1, 6, - 6) and (4, 9, - 6) are the vertices of an isosceles triangle. (ii) (0, 7, 10), (-1, 6, 6) and (- 4, 9, 6) are the vertices of a right angled triangle. (iii) (-1, 2, 1), (1, -2, 5), (4, -7, 8) and (2, -3, 4) are the vertices of a parallelogram.