3.4.2 Museo de Onda: Azulejo 2—Geometric Construction and Derivative Insight

3.4.2 Museo de Onda: Azulejo 2—Geometric Construction and Derivative Insight
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2023-03-22 21:33
In collections geometriadinamica.es
This example recreates a “wave museum (Museo de Onda) tile” style pattern (Azulejo 2) by combining straight-line constructions with symmetry and translation, letting learners explore how a structured graphic emerges from a small set of geometric rules. It highlights core concepts such as geometric construction (lines, intersection points, midpoints), transformation geometry (mirror and translation), and vector-based direction relationships. The construction also incorporates Min to select extremal quantities and uses additional difference/variation objects (e.g., dif-like variables and derivative-related entities) to support an intuition for how certain measures change—linking the visualization to derivative/changes in value. Key GeoGebra commands include Line and Point to create base elements; OrthogonalLine and Intersect to build perpendicular constraints and compute intersections; Midpoint to establish symmetry baselines; Mirror for reflection; Vector to represent directional relationships; Translate to move parts of the figure; and Min to determine minimal related values. Designed for classroom demonstration and student exploration in later middle school through early university, especially for lessons connecting transformation geometry with calculus ideas (derivative/variation).

GeoGebra Commands & Parameters

  1. Line(A, B) → b
  2. Line(G, b) → e
  3. Point(e) → J
  4. OrthogonalLine(J, e) → h
  5. OrthogonalLine(G, e) → f
  6. Point(f) → H
  7. OrthogonalLine(H, f) → g
  8. Intersect(g, h) → E
  9. Midpoint(E, H) → I
  10. Midpoint(I, E) → B_1
  11. Midpoint(G, J) → D
  12. Midpoint(J, E) → F
  13. Midpoint(H, G) → K
  14. Midpoint(D, I) → L
  15. Midpoint(K, L) → M
  16. Midpoint(L, F) → N
  17. Midpoint(F, J) → O
  18. Midpoint(J, D) → P
  19. Midpoint(G, D) → Q
  20. Midpoint(K, G) → R
  21. Midpoint(Q, M) → S
  22. Midpoint(L, D) → T
  23. Midpoint(P, N) → U
  24. Midpoint(F, E) → V
  25. Midpoint(K, H) → W
  26. Midpoint(W, V) → Z
  27. Midpoint(H, I) → A_1
  28. Midpoint(N, B_1) → C_1
  29. Midpoint(Z, W) → D_1
  30. Midpoint(D, U) → E_1
  31. Midpoint(U, J) → F_1
  32. Midpoint(T, Q) → G_1
  33. Midpoint(S, G) → H_1
  34. Midpoint(S, K) → I_1
  35. Midpoint(M, T) → J_1
  36. Midpoint(T, N) → K_1
  37. Midpoint(N, O) → L_1
  38. Midpoint(F, C_1) → M_1
  39. Midpoint(C_1, L) → N_1
  40. Midpoint(L, D_1) → O_1
  41. Midpoint(D_1, K) → P_1
  42. Midpoint(H, D_1) → Q_1
  43. Midpoint(D_1, I) → R_1
  44. Midpoint(I, C_1) → S_1
  45. Midpoint(C_1, E) → T_1
  46. Mirror(F_1, h) → U_1
  47. Mirror(L_1, h) → V_1
  48. Mirror(M_1, h) → W_1
  49. Mirror(T_1, h) → Z_1
  50. Mirror(B_1, h) → A_2
  51. Line(Q, A_2) → d
  52. Line(F, d) → i
  53. Line(C_1, d) → k
  54. Line(S_1, k) → l
  55. Line(R_1, L_1) → j
  56. Line(D_1, j) → m
  57. Line(M, j) → n
  58. Line(I, j) → p
  59. Line(S, A_1) → t
  60. Line(I, T) → a_1
  61. Line(U, B_1) → b_1
  62. Line(E_1, N_1) → c_1
  63. Line(F_1, M_1) → d_1
  64. Line(G_1, R_1) → e_1
  65. Line(W_1, P_1) → g_1
  66. Line(Q_1, Z_1) → h_1
  67. Point(a_1) → F_2
  68. Mirror(F_2, m) → L_2
  69. Mirror(F_2, m) → M_2
  70. Point(b) → A1
  71. Min(90, ((a - 1) * 90)) → r1
  72. Line(G_1, O_1) → l_1
  73. OrthogonalLine(G_1, l_1) → m_1
  74. OrthogonalLine(J_1, l_1) → q_1
  75. OrthogonalLine(O_1, l_1) → r_1
  76. OrthogonalLine(R_1, l_1) → s_1
  77. OrthogonalLine(E_1, m_1) → t_1
  78. OrthogonalLine(F_1, m_1) → a_2
  79. Point(a_1) → C
  80. OrthogonalLine(F_2, d) → i_1
  81. OrthogonalLine(C, d) → j_1
  82. Min(180, ((a - 1) * 180)) → r2
  83. Min(270, ((a - 1) * 270)) → r3
  84. Min(180, ((a - 5.5) * 180)) → r4
  85. Vector(R, S) → z_1
  86. Vector(R, G) → u_2
  87. Translate(pic1, u_2) → pic1'
  88. Translate(pic1', u_2) → pic1''
  89. Translate(pic1'', u_2) → pic1'''
  90. Translate(pic1, z_1) → pic1'_1
  91. Translate(pic1'_1, z_1) → pic2
  92. Translate(pic2, z_1) → pic2'
  93. Translate(pic2', z_1) → pic2''
  94. Translate(pic1', z_1) → pic1''_1
  95. Translate(pic1'', z_1) → pic1'''_1
  96. Translate(pic1'''_1, z_1) → pic3
  97. Translate(pic1''', z_1) → pic4
  98. Translate(pic4, z_1) → pic4'
  99. Translate(pic1''_1, z_1) → pic5
  100. Translate(pic5, z_1) → pic5'
  101. Translate(pic5', z_1) → pic5''
  102. Translate(pic4', z_1) → pic4''
  103. Translate(pic4'', z_1) → pic4'''
  104. Translate(pic3, z_1) → pic3'
  105. Translate(pic3', z_1) → pic3''
  106. Translate(pic1''', u_2) → pic6
  107. Translate(pic4, u_2) → pic4'_1
  108. Translate(pic4'_1, z_1) → pic7
  109. Translate(pic7, z_1) → pic7'
  110. Translate(pic7', z_1) → pic7''
  111. Midpoint(H_1, G_1) → B_2
  112. Midpoint(G_1, E_1) → C_2
  113. Midpoint(E_1, F_1) → D_2
  114. Midpoint(F_1, U_1) → E_2
  115. Midpoint(O, U) → G_2
  116. Midpoint(U, T) → H_2
  117. Midpoint(T, S) → I_2
  118. Midpoint(S, R) → J_2
  119. Midpoint(I_1, J_1) → K_2
  120. Midpoint(J_1, K_1) → N_2
  121. Midpoint(K_1, L_1) → O_2
  122. Midpoint(L_1, V_1) → P_2
  123. Midpoint(F, N) → Q_2
  124. Midpoint(N, L) → R_2
  125. Midpoint(L, M) → S_2
  126. Midpoint(M, K) → T_2
  127. Midpoint(P_1, O_1) → U_2
  128. Midpoint(O_1, N_1) → V_2
  129. Midpoint(N_1, M_1) → W_2
  130. Midpoint(M_1, W_1) → Z_2
  131. Midpoint(V, C_1) → A_3
  132. Midpoint(C_1, Z) → B_3
  133. Midpoint(Z, D_1) → C_3
  134. Midpoint(D_1, W) → D_3

AI Drawing Prompt Reference

Start with a base line, then construct a perpendicular line through a point on it, forming a rectangular grid framework. Generate a series of symmetrically placed points by repeatedly taking midpoints within the grid, creating a tile-like geometric pattern. Use the perpendicular line as an axis of symmetry to mirror some points to the other side, ensuring left-right symmetry. The final figure consists of lines, perpendiculars, midpoints, and mirrored points, forming a regular decorative geometric design suitable for exploring symmetry and transformations.
The prompt above was compiled from the original drawing commands and is for reference only.