ICSE Class 9 Answered
Using section formula, show that the points A(7, -5) , B(9, -3) and C( 13 1) are collinear
Asked by spkattruva | 30 Jan, 2019, 09:55: PM
Expert Answer
Let a point B(9,-3) divides the line joining the points A(7,-5) and C(13,1) in the ratio 1:k as shown in figure.
as per section formula, x-coordinate of B =
y-coordinate of B =
From x-coordinate and y-coordinate of B, we get same ratio of AB/BC. Hence all the three points A,B and C are collinear
Answered by Thiyagarajan K | 31 Jan, 2019, 01:43: PM
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