Three Dimensional Geometry
NCERT Class 12
CBSE
Grade 12
Question:
Check whether lines $\dfrac{x-5}{4} = \dfrac{y-2}{1} = \dfrac{z-3}{1}$ and $\dfrac{x-1}{1} = \dfrac{y-2}{2} = \dfrac{z-3}{3}$ are perpendicular.
Step-by-Step Solution
$4(1) + 1(2) + 1(3) = 9
e 0$. [1.0 Mark]
Lines are not perpendicular. [1.0 Mark]
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🎯 Official CBSE Marking Scheme:
Calculating dot product of direction ratios: 1.0 Mark
Concluding lines are not perpendicular: 1.0 Mark
Correct Answer:
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