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Proving Angles Congruent (2)

Proving Angles Congruent (2)
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2016-10-31 13:45
AngleTransformationGeometric Construction
This example demonstrates how to prove angles congruent through a transformational geometry exercise. Key mathematical concepts include rotation and geometric transformations. Using GeoGebra commands such as point, line segment, circle, and rotation, students can understand the properties of angles and transformation principles. Suitable for middle school and above students to learn about geometric transformations and proof techniques.

GeoGebra Commands & Parameters

  1. Point(xAxis) → A_1
  2. Segment(A_1, A) → f
  3. Max(x(A_1), x(A)) → a
  4. PointIn(b) → B
  5. Circle(B, f) → c
  6. Point(c) → D
  7. Segment(B, D) → g
  8. Circle(A, A_1) → d
  9. Line(A, A_1) → h
  10. Intersect(d, h, 2) → F
  11. CircleArc(A, A_1, F) → e
  12. Point(e) → E
  13. Angle(A_1, A, E) → α
  14. Rotate(D, α, B) → D'
  15. Segment(A, E) → i
  16. Segment(B, D') → j
  17. Circle(A, (0.5 * f)) → k
  18. Intersect(k, f) → G,
  19. Intersect(k, i) → H,
  20. Circle(B, (0.5 * f)) → p
  21. Intersect(p, g, 1) → I
  22. Intersect(p, j, 1) → J
  23. CircleSector(A, G, H) → q
  24. CircleSector(B, I, J) → r
  25. Segment(A, A_1) → l
  26. Segment(A, E) → m
  27. Segment(B, D) → n
  28. Segment(B, D') → s