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Are the points (-3,-3),(-3,2)and(-3,5)collinear?give reason.

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Are the points (-3,-3),(-3,2)and(-3,5)collinear?give reason.

Posted by Himesh Kaushik 8 years, 11 months ago

CBSE > Class 10 > Mathematics

1 answers

Rashmi Bajpayee 8 years, 11 months ago

For collinear,

Area of triangle = 0

1/2[x₁(y₂-y₃) + x₂(y₃-y₁) + x₃(y₁-y₂) = 0

(-3)(2-5) - 3(5+3) - 3(-3-2) = 0

9 - 24 + 15 = 0

24 - 24 = 0

0 = 0

Since Area of traingle = 0

therefore, points are collinear.

0Thank You

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