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Straight Lines — Maths STD 11 Science — Question

CBSE BoardEnglish MediumSTD 11 ScienceMathsStraight Lines1 Mark
Question
Line joining the points (3, -4) and (-2, 6) is perpendicular to the line joining the points (-3, 6) and (9, -18).
✓

Answer

False.
Solution:
Given points are A(3, -4), B(-2, 6), C(-3, 6) and D(9, -18).
Now, slope of $\text{AB}=\frac{6+4}{-2-3}=-2$
And slope of $\text{CD}=\frac{-18-6}{9+3}=-2$
So, line AB is paralle to line CD.

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