Three Dimensional Geometry
NCERT Exemplar Class 12
CBSE
Grade 12
Question:
Distance of point $P(a, b, c)$ from x-axis is:
(a) $\sqrt{b^2 + c^2}$
(b) $\sqrt{a^2 + b^2}$
(c) $\sqrt{a^2 + c^2}$
(d) $a$
Step-by-Step Solution
Foot of perpendicular on x-axis is (a, 0, 0). Distance = \sqrt{b^2 + c^2}. [1.0 Mark]
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🎯 Official CBSE Marking Scheme:
Selecting $\sqrt{b^2 + c^2}$: 1.0 Mark
Correct Answer: $\sqrt{b^2 + c^2}$
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