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Unit Circle by Malin Christersson

Unit Circle by Malin Christersson
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2019-02-20 22:06
CircleTrigonometryCoordinate GeometryGeometric Construction
This example demonstrates the construction of the unit circle and its relationship with trigonometric functions. Key math concepts include circle, trigonometry, angle, and coordinate geometry. It uses commands like Point, Circle, Angle, OrthogonalLine, Intersect, Polygon, Segment in GeoGebra. Suitable for high school mathematics teaching and geometric construction learning.

GeoGebra Commands & Parameters

  1. Point(yAxis) → O
  2. Point(xAxis) → B
  3. Circle(O, B) → c
  4. Point(c) → A
  5. Angle(B, O, A) → α
  6. OrthogonalLine(A, xAxis) → f
  7. Intersect(f, xAxis) → C
  8. Polygon(O, C, A) → t1, a, o, c_1
  9. Segment(O, A) → g
  10. Segment(O, C) → h
  11. OrthogonalLine(A, yAxis) → i
  12. Intersect(i, yAxis) → D
  13. Segment(D, O) → j
  14. Segment(D, A) → k
  15. Segment(A, C) → l