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Two gears mesh together. The small gear has rotational symmetry of order 8 (teeth equally spaced) and the big gear has order 24.
The angle between two adjacent teeth on the big gear is what fraction of the angle between two adjacent teeth on the small gear?

Class 7Rotational SymmetryGeometry
  • A
  • B
  • C3
  • D

Step-by-Step Solution

Small gear angle = 360°/8 = 45°; big gear angle = 360°/24 = 15°. Ratio = .
Answer: A)

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