CBSE Class 10 Answered
i have a doubt in co ordinate geometry.please explain me.
Asked by | 12 Dec, 2009, 09:43: AM
Expert Answer
Points are collinear if the area of the triangle formed by joining the points ABC is zero
Area of triangle ABC = 1/2[1(1-11)+k(11-5)+4(5-1)] =1/2 [-10+16+6k]=1/2[6k+6]
Now for area to be zero k =-1
Answered by | 12 Dec, 2009, 05:44: PM
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