Geometry

Question Analysis:  
This question applies reflections to a real-world scenario (kaleidoscope mirrors) and tests understanding of angle doubling.  

Key Concept Explanation:  
- Mirrors = Reflecting lines.  
- Two reflections over intersecting lines produce a rotation equal to twice the angle between the mirrors.  
- Here, mirrors intersect at 30°, so rotation = 2 * 30° = 60°.  

Step-by-Step Solution:  
1. Angle between mirrors = 30°.  
2. Two reflections → Rotation of 2 * 30° = 60°.  

Option Analysis:  
- A) Incorrect – This is the angle between mirrors, not the rotation.  
- B) Correct – Matches 2 * 30°.  
- C) Incorrect – Would require mirrors at 45°.  
- D)...