22. Show that the points (1, -1), (5, 2) and (9, 5) are collinear. – InterviewSolution

1.

22. Show that the points (1, -1), (5, 2) and (9, 5) are collinear.

Answer»

For collinear, area of triangle=0=(1/2)[1(2-5)+5(5+1)+9(-1-2)]=(1/2)[-3+30-27]=(1/2)[27-27]=0

Hence collinear points

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