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Determine if the points (1, 5), (2, 3) and (-2, -11) are collinear. Q.3

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What is the best solution of coordinate geometry  of class 10 ,give me easy way to solve this question quickly . Determine if the points (1, 5), (2, 3) and (-2, -11) are collinear.

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  1. The sum of the lengths of any two line segments is equal to the length of the third line segment then all three points are collinear.

    Consider, A = (1, 5) B = (2, 3) and C = (-2, -11)

    Find the distance between points; say AB, BC and CA

    NCERT Solutions for Class 10 Chapter 7-3

    Since AB + BC ≠ CA

    Therefore, the points (1, 5), (2, 3), and ( – 2, – 11) are not collinear.

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