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Exploring Reflections with Intersecting Lines by Brittany Wilson

Exploring Reflections with Intersecting Lines by Brittany Wilson
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2015-11-09 09:00
Coordinate GeometryTransformationGeometric Construction
This example demonstrates how to use intersecting lines for reflections. Key mathematical concepts include reflection, intersection, and transformation. Using GeoGebra commands such as Polygon, Line, and Mirror, you can dynamically explore the reflection phenomenon. Suitable for high school and above students or teachers.

GeoGebra Commands & Parameters

  1. Polygon(A, B, C, D, E, F, G, H, I, J) → poly1, a, j, b, c, d, e, f, g, h, i
  2. Line(K, L) → Mirror1
  3. Mirror(A, Mirror1) → A'
  4. Mirror(B, Mirror1) → B'
  5. Mirror(C, Mirror1) → C'
  6. Mirror(D, Mirror1) → D'
  7. Mirror(E, Mirror1) → E'
  8. Mirror(F, Mirror1) → F'
  9. Mirror(G, Mirror1) → G'
  10. Mirror(H, Mirror1) → H'
  11. Mirror(I, Mirror1) → I'
  12. Mirror(J, Mirror1) → J'
  13. Polygon(A', B', C', D', E', F', G', H', I', J') → poly1'_1, a'_1, j'_1, b'_1, c'_1, d'_1, e'_1, f'_1, g'_1, h'_1, i'_1
  14. Mirror(A, Mirror1) → D16
  15. Mirror(B, Mirror1) → D17
  16. Mirror(C, Mirror1) → D18
  17. Mirror(D, Mirror1) → D19
  18. Mirror(E, Mirror1) → D20
  19. Mirror(F, Mirror1) → D21
  20. Mirror(G, Mirror1) → D22
  21. Mirror(H, Mirror1) → D23
  22. Mirror(I, Mirror1) → D24
  23. Mirror(J, Mirror1) → D25
  24. Distance(C, Mirror1) → l
  25. Distance(A, Mirror1) → B2
  26. Distance(B, Mirror1) → B3
  27. Distance(C, Mirror1) → B4
  28. Distance(D, Mirror1) → B5
  29. Distance(E, Mirror1) → B6
  30. Distance(F, Mirror1) → B7
  31. Distance(G, Mirror1) → B8
  32. Distance(H, Mirror1) → B9
  33. Distance(I, Mirror1) → B10
  34. Distance(J, Mirror1) → B11
  35. Distance(A', Mirror1) → D2
  36. Distance(B', Mirror1) → D3
  37. Distance(C', Mirror1) → D4
  38. Distance(D', Mirror1) → D5
  39. Distance(E', Mirror1) → D6
  40. Distance(F', Mirror1) → D7
  41. Distance(G', Mirror1) → D8
  42. Distance(H', Mirror1) → D9
  43. Distance(I', Mirror1) → D10
  44. Distance(J', Mirror1) → D11
  45. Line(M, K) → Mirror2
  46. Mirror(A', Mirror2) → A''
  47. Mirror(B', Mirror2) → B''
  48. Mirror(C', Mirror2) → C''
  49. Mirror(D', Mirror2) → D''
  50. Mirror(E', Mirror2) → E''
  51. Mirror(F', Mirror2) → F''
  52. Mirror(G', Mirror2) → G''
  53. Mirror(H', Mirror2) → H''
  54. Mirror(I', Mirror2) → I''
  55. Mirror(J', Mirror2) → J''
  56. Polygon(A'', B'', C'', D'', E'', F'', G'', H'', I'', J'') → poly2, a'', j'', b'', c'', d'', e'', f'', g'', h'', i''
  57. Angle(Mirror1, Mirror2) → α
  58. Intersect(Mirror1, Mirror2) → O
  59. Angle(B16, O, A'') → β