Last updated at May 29, 2018 by Teachoo

Transcript

Example, 5 Show that the points A (2, 3, 4), B (1, 2, 3) and C (3, 8, 11) are collinear. Three points A, B, C are collinear if direction ratios of AB and BC are proportional. Now, 2 1 = 2 1 = 2 2 1 = 10 5 = 2 2 1 = 14 7 = 2 Since, = = = 2 Therefore, A, B and C are collinear.

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Chapter 11 Class 12 Three Dimensional Geometry

Serial order wise

About the Author

Davneet Singh

Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 8 years. He provides courses for Maths and Science at Teachoo. You can check his NCERT Solutions from Class 6 to 12.