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Proof Without Words by Cristin Young

Proof Without Words by Cristin Young
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2018-08-23 21:29
TriangleCircleGeometric ConstructionSlider Animation
This example demonstrates geometric proof through interactive point dragging. It involves concepts like geometry transformations, triangle properties, and circle properties. Construction uses GeoGebra commands such as Intersect, Point, Ray, Mirror, Semicircle, CircleArc, Segment, Polygon, Midpoint, OrthogonalLine, Vector, Centroid, Translate. Suitable for middle school or high school students for geometry learning, classroom interaction, or self-exploration.

GeoGebra Commands & Parameters

  1. Intersect(xAxis, yAxis) → A
  2. Point(xAxis) → B
  3. Ray(A, B) → a
  4. Point(a) → C
  5. Mirror(C, A) → C'
  6. Semicircle(C, C') → c
  7. Intersect(c, yAxis) → D,
  8. CircleArc(A, D, C) → d
  9. Point(d) → E
  10. Segment(C, E) → b
  11. Segment(E, C') → e
  12. Segment(C', C) → f
  13. Polygon(C', C, 4) → poly1, g, h, i, j, F, G
  14. Polygon(C, E, 4) → poly2, k, l, m, n, H, I
  15. Polygon(E, C', 4) → poly3, p, q, r, s, J, K
  16. Midpoint(E, J) → L
  17. OrthogonalLine(L, i) → t
  18. OrthogonalLine(L, t) → a_1
  19. Intersect(a_1, s) → M
  20. Intersect(t, r) → N
  21. Intersect(a_1, q) → O
  22. Intersect(t, e) → P
  23. Polygon(M, L, N, K) → poly4, m_1, l_1, n_1, k_1
  24. Polygon(L, N, J, O) → poly5, l_2, n_2, j_1, o
  25. Polygon(L, P, C', O) → poly6, l_3, p_1, c', o_1
  26. Polygon(P, L, M, E) → poly7, p_2, l_4, m_2, e_1
  27. Vector(L, C) → u
  28. Vector(L, F) → v
  29. Vector(L, C') → w
  30. Vector(L, G) → u_1
  31. Centroid(poly4) → Q
  32. Centroid(poly5) → R
  33. Centroid(poly6) → S
  34. Centroid(poly7) → T
  35. Translate(T, w) → T'
  36. Translate(S, u) → S'
  37. Translate(R, v) → R'
  38. Translate(Q, u_1) → Q'
  39. Segment(Q, Q') → b_1
  40. Segment(R, R') → c_1
  41. Segment(S, S') → d_1
  42. Segment(T, T') → f_1
  43. Point(b_1) → U
  44. Point(c_1) → V
  45. Point(d_1) → W
  46. Point(f_1) → Z
  47. Vector(Q, U) → v_1
  48. Vector(R, V) → w_1
  49. Vector(S, W) → g_1
  50. Vector(T, Z) → h_1
  51. Translate(L, w_1) → L'
  52. Translate(N, w_1) → N'
  53. Translate(J, w_1) → J'
  54. Translate(O, w_1) → O'
  55. Polygon(L', N', J', O') → poly5', l', n', j', o'
  56. Translate(M, v_1) → M'
  57. Translate(L, v_1) → L'_1
  58. Translate(N, v_1) → N'_1
  59. Translate(K, v_1) → K'
  60. Polygon(M', L'_1, N'_1, K') → poly4', m', l'_1, n'_1, k'
  61. Translate(L, g_1) → L'_2
  62. Translate(P, g_1) → P'
  63. Translate(C', g_1) → C''
  64. Translate(O, g_1) → O'_1
  65. Polygon(L'_2, P', C'', O'_1) → poly6', l'_2, p', c'', o'_1
  66. Translate(P, h_1) → P'_1
  67. Translate(L, h_1) → L'_3
  68. Translate(M, h_1) → M'_1
  69. Translate(E, h_1) → E'
  70. Polygon(P'_1, L'_3, M'_1, E') → poly7', p'_1, l'_3, m'_1, e'
  71. Midpoint(H, C) → A_1
  72. Midpoint(C, G) → B_1
  73. Segment(A_1, B_1) → i_1
  74. Point(i_1) → C_1
  75. Vector(A_1, C_1) → q_1
  76. Translate(poly2, q_1) → poly2'

AI Drawing Prompt Reference

This is a geometric proof diagram with a triangle and a circle. The triangle's vertex is dragged, and the circle changes accordingly. The diagram includes symmetric line segments, perpendicular line segments, and multiple triangles. The construction order starts with the triangle, then adds the circle and symmetric line segments, followed by perpendicular line segments and triangles. The diagram is used to demonstrate geometric transformations and triangle properties.
The prompt above was compiled from the original drawing commands and is for reference only.