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Clocks and Angles

Clocks and Angles
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2019-03-10 02:00
AngleVectorGeometric Construction
This example demonstrates the angles formed by the hour and minute hands on a clock. It involves concepts of angles and rotation, constructed using GeoGebra commands such as Intersect, Circle, Vector, Rotate, Angle, and Segment. Suitable for middle school and above students to learn about angles and time.

GeoGebra Commands & Parameters

  1. Intersect(xAxis, yAxis) → A
  2. Circle(A, 1) → c
  3. Circle(A, 1.5) → d
  4. Point(c) → B
  5. Vector(A, B) → u
  6. Vector(A, C) → v
  7. Rotate(B, (-α), A) → A'
  8. Rotate(C, (-β), A) → A'_1
  9. Vector(A, A') → w
  10. Vector(A, A'_1) → a
  11. Angle(A', A, B) → γ
  12. Angle(A'_1, A, B) → δ
  13. Circle(A, D) → g
  14. Segment(A, (x(C), y(C) + 1)) → j