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Three Dimensional Geometry

NCERT Exemplar Class 12

CBSE

Grade 12

Question:

The reflection of point $(1, 2, 3)$ in xy-plane is:
(a) $(1, 2, -3)$
(b) $(-1, -2, 3)$
(c) $(1, -2, 3)$
(d) $(-1, 2, 3)$

Step-by-Step Solution

z-coordinate changes sign under reflection across xy-plane. [1.0 Mark]

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🎯 Official CBSE Marking Scheme:
Selecting $(1, 2, -3)$: 1.0 Mark

Correct Answer: $(1, 2, -3)$

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