imo class 12 three dimensional geometry

The angle between planes 2x+y−z=0 and 4x+2y−2z=5 is:

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#IMO#Class 12#Mathematics#Three-Dimensional Geometry#mathematical-reasoning

The angle between planes 2x+y−z=0 and 4x+2y−2z=5 is:

  • A. 90°
  • B. 45°
  • C. 0°
  • D. 60°

Answer: C) 0°

Explanation: Normals are proportional, so planes are parallel.

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