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Rotational Symmetry with 4 Shapes

Rotational Symmetry with 4 Shapes
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2018-11-01 19:30
PolygonTransformationGeometric Construction
This example demonstrates rotational symmetry using four shapes. It involves core math concepts like symmetry, rotation transformation, and polygon construction. Key GeoGebra commands used include Polygon, Segment, Rotate, Midpoint, Line, Intersect, and OrthogonalLine. Suitable for middle school students and above to learn geometric transformations and symmetry, or for educational demonstrations.

GeoGebra Commands & Parameters

  1. Polygon(A, B, 5) → poly1, a, b, c, d, e, C, D, E
  2. Polygon(F, N, G, M, H, O, J, L) → poly2, f, n, g, m, h, o, j, l
  3. Segment(I, K) → i
  4. Segment(K, P) → k
  5. Segment(P, Q) → p
  6. Rotate(K, 240°, R) → K'
  7. Rotate(P, 240°, R) → P'
  8. Segment(K', P') → k'
  9. Rotate(K', 240°, R) → K''
  10. Rotate(P', 240°, R) → P''
  11. Segment(K'', P'') → k''
  12. Rotate(P, 240°, R) → P'_1
  13. Rotate(Q, 240°, R) → Q'
  14. Segment(P'_1, Q') → p'
  15. Rotate(I, 120°, R) → I'
  16. Rotate(K, 120°, R) → K'_1
  17. Segment(I', K'_1) → i'
  18. Rotate(I, 240°, R) → I'_1
  19. Rotate(K, 240°, R) → K'_2
  20. Segment(I'_1, K'_2) → i'_1
  21. Rotate(P, 120°, R) → P'_2
  22. Rotate(Q, 120°, R) → Q'_1
  23. Segment(P'_2, Q'_1) → p'_1
  24. Segment(I, Q'_1) → q
  25. Segment(Q, I'_1) → r
  26. Segment(Q', I') → s
  27. Polygon(K, P, Q'_1, I, Q, I'_1, K', P', Q', I', K'', P'') → poly3, k_1, p'', q'_1, i_1, p_1, q_1, i'_2, k'_1, p'_2, q', i'_3, k''_1
  28. Polygon(S, T, U, V) → poly4, s_1, t, u, v
  29. Midpoint(N, O) → W
  30. Midpoint(S, T) → Z
  31. Midpoint(S, V) → A_1
  32. Line(A_1, s_1) → a_1
  33. Line(Z, t) → b_1
  34. Intersect(a_1, b_1) → B_1
  35. OrthogonalLine(D, a) → c_1
  36. OrthogonalLine(C, e) → d_1
  37. Intersect(c_1, d_1) → C_1
  38. Rotate(poly1, w°, C_1) → poly1'
  39. Rotate(F, w°, W) → F'
  40. Rotate(N, w°, W) → N'
  41. Rotate(G, w°, W) → G'
  42. Rotate(M, w°, W) → M'
  43. Rotate(H, w°, W) → H'
  44. Rotate(O, w°, W) → O'
  45. Rotate(J, w°, W) → J'
  46. Rotate(L, w°, W) → L'
  47. Polygon(F', N', G', M', H', O', J', L') → poly2', f', n', g', m', h', o', j', l'
  48. Rotate(K, w°, R) → K'_3
  49. Rotate(P, w°, R) → P'_3
  50. Rotate(Q, w°, R) → Q'_2
  51. Rotate(I'_1, w°, R) → D_1
  52. Rotate(K', w°, R) → K''_1
  53. Rotate(P', w°, R) → P''_1
  54. Rotate(Q', w°, R) → Q''
  55. Rotate(I', w°, R) → I''
  56. Rotate(K'', w°, R) → K'''
  57. Rotate(P'', w°, R) → P'''
  58. Rotate(Q'_1, w°, R) → E_1
  59. Rotate(I, w°, R) → I'_2
  60. Polygon(K'_3, P'_3, E_1, I'_2, Q'_2, D_1, K''_1, P''_1, Q'', I'', K''', P''') → poly3', k'_3, p''', e_1, i'_4, p'_3, q'_2, d_2, k''_2, p''_1, q'', i'', k'''
  61. Rotate(S, w°, B_1) → S'
  62. Rotate(T, w°, B_1) → T'
  63. Rotate(U, w°, B_1) → U'
  64. Rotate(V, w°, B_1) → V'
  65. Polygon(S', T', U', V') → poly4', s', t', u', v'
  66. Polygon(F_1, G_1, H_1) → poly5, h_1, f_1, g_1
  67. OrthogonalLine(G_1, g_1) → j_1
  68. Intersect(j_1, g_1) → I_1
  69. Midpoint(I_1, G_1) → J_1
  70. Rotate(F_1, w°, J_1) → K_1
  71. Rotate(G_1, w°, J_1) → L_1
  72. Rotate(H_1, w°, J_1) → M_1
  73. Polygon(K_1, L_1, M_1) → poly5', m_1, k_2, l_1

AI Drawing Prompt Reference

Create a rotational symmetry design with four shapes. Start by drawing two pentagons, then rotate these shapes around a point to create rotational symmetry. Next, draw auxiliary lines and find their intersections. Finally, use these points and lines to construct more shapes and segments, forming a complex symmetric design.
The prompt above was compiled from the original drawing commands and is for reference only.