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Prove that the points (6,4) (4,5) and (2...

Prove that the points (6,4) (4,5) and (2,6) are collinear.

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Area of triangle `=1/2[x_(1)(y_(2)-y_(3))+x_(2)(y_(3)-y_(1))+x_(3)(y_(1)-y_(2))]`
`=1/2[6(5-6)+4(6-4)+2(4-5)]=1/2[-6+8-3]=0`
Therefore, the given points are collinear.
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