Question

Which of the following set of points are non- collinear

• A. (1, –1, 1), (–1, 1, 1), (0, 0, 1)
• B. (1, 2, 3), (3, 2, 1), (2, 2, 2)
• C. (–2,4, –3), (4, –3, –2), (–3, –2, 4)
• D. (2, 0, –1), (3, 2, –2), (5, 6, –4)

Answer 1

Answer: (C)

(–2,4, –3), (4, –3, –2), (–3, –2, 4)

Answer 2

Check option (3), $\frac { 4 - ( - 2 ) } { - 3 - 4 } \neq \frac { - 3 - 4 } { - 2 - ( - 3 ) }$

Therefore, this set of points is non-collinear.