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# In Each of the Following Find the Value of 'K', for Which the Points Are Collinear. (8, 1), (K, -4), (2, -5) - CBSE Class 10 - Mathematics

#### Question

In each of the following find the value of 'k', for which the points are collinear.

(8, 1), (k, -4), (2, -5)

#### Solution

For collinear points, area of triangle formed by them is zero.

Therefore, for points (8, 1), (k, - 4), and (2, - 5), area = 0

1/2 [8 { -4- (-5)} + k{(-5)-(1)} + 2{1 -(-4)}] = 0

8 - 6k + 10 = 0

6k = 18

k = 3

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#### APPEARS IN

NCERT Solution for Mathematics Textbook for Class 10 (2019 to Current)
Chapter 7: Coordinate Geometry
Ex. 7.30 | Q: 2.2 | Page no. 170

#### Video TutorialsVIEW ALL [1]

Solution In Each of the Following Find the Value of 'K', for Which the Points Are Collinear. (8, 1), (K, -4), (2, -5) Concept: Area of a Triangle.
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