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Clock Angle

Clock Angle
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2015-12-10 09:20
AngleTrigonometryGeometric Construction
In collections iShortcut Geometry Vol. 1: Lines & Angles
This example demonstrates the angle relationship between clock hands. Key mathematical concepts include angles, trigonometry, and geometric construction. Using GeoGebra commands such as Point, Circle, Segment, Intersect, Rotate, and Angle, the example dynamically shows the angle changes of clock hands. Suitable for middle school and above students to learn about angles and trigonometry.

GeoGebra Commands & Parameters

  1. Point(xAxis) → A
  2. Point(xAxis) → B
  3. Circle(A, B) → c
  4. Point(c) → D
  5. Segment(D, A) → b
  6. Point(xAxis) → C
  7. Circle(A, C) → d
  8. Intersect(d, b, 1) → E
  9. Rotate(E, (-α), A) → E'
  10. Segment(E', A) → a
  11. Angle(E', A, E) → β