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If area of triangle is 35 sq units with ...

If area of triangle is 35 sq units with vertices `(2, - 6), (5, 4) a n d (k , 4)`. Then k is(A) 12 (B) `-2` (C) ` 12 , 2` (D) `12 , 2`

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The correct Answer is:
`K=-2 or 12`
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