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Maths CBSE Live product
Class 9 (2026-27)
Coordinate geometry
Distance & Midpoint of two points in 2D plane
10.
Check the collinearity
Question:
5
m.
Three light posts were located on the street at points \(A(8, 16)\), \(B(10, 20)\) and \(C(12, 24)\).
Check
that the light posts lie in a straight line.
Answer:
\(AB =\)
i
i
\(BC =\)
i
i
\(AC =\)
i
i
Thus,
\(AB + BC = AC\)
\(AB + BC \neq AC\)
\(AB + AC = BC\)
\(AB + AC \neq BC\)
The light posts
lie
does not
in a straight line.
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