Area of a Regular Dodecagon

Area of a Regular Dodecagon
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2023-03-13 17:50
In collections geometriadinamica.es
This example demonstrates how to construct the area of a regular dodecagon. Key mathematical concepts include circles, triangles, vectors, and geometric constructions. The construction involves GeoGebra commands such as Mirror, Circle, Intersect, etc. Suitable for middle or high school mathematics to understand geometric transformations and area calculations.

GeoGebra Commands & Parameters

  1. Mirror(B, A) → E
  2. Circle(B, A) → d
  3. Circle(A, B) → c
  4. Intersect(d, c, 2) → C
  5. Mirror(C, A) → G
  6. Intersect(d, c, 1) → D
  7. Mirror(D, A) → F
  8. Vector(N, O) → z
  9. LineBisector(C, B) → b
  10. LineBisector(D, B) → f
  11. LineBisector(C, F) → g
  12. Intersect(c, b) → I, J
  13. Intersect(c, g) → K, L
  14. Intersect(c, f) → M, P
  15. Polygon(B, G, L, D, M) → Q, b_1, g_1, l, d_1, m
  16. Mirror(B, b_1) → B'
  17. Mirror(G, b_1) → G'_1
  18. Mirror(L, b_1) → L'
  19. Mirror(D, b_1) → D'
  20. Mirror(M, b_1) → M'
  21. Polygon(B', G'_1, L', D', M') → Q', b', g'_1, l', d', m'
  22. Mirror(B', d') → B''
  23. Mirror(G'_1, d') → G'_1'
  24. Mirror(L', d') → L''
  25. Mirror(D', d') → D''
  26. Mirror(M', d') → M''
  27. Polygon(B'', G'_1', L'', D'', M'') → Q'', b'', g'_1', l'', d'', m''
  28. Mirror(B'', b'') → B'''
  29. Mirror(G'_1', b'') → G'_1''
  30. Mirror(L'', b'') → L'''
  31. Mirror(D'', b'') → D'''
  32. Mirror(M'', b'') → M'''
  33. Polygon(B''', G'_1'', L''', D''', M''') → Q''', b''', g'_1'', l''', d''', m'''
  34. Polygon(A, L'', P, E, I, G, L') → R, a_1, l''_1, p, e_1, i, g_2, l'_1
  35. Polygon(J, M', B) → S, b_2, j, m'_1
  36. Polygon(J, C, M, B, K, F, P, E, I, G, L, D) → T, j_1, d_2, m_1, b_3, c_1, k, f_1, p_1, e_2, i_1, g_3, l_1
  37. Angle(L', G, L) → α
  38. Rotate(B', β, G) → B''_1
  39. Rotate(G'_1, β, G) → G'_2
  40. Rotate(L', β, G) → L''_1
  41. Rotate(D', β, G) → D''_1
  42. Rotate(M', β, G) → M''_1
  43. Polygon(B''_1, G'_2, L''_1, D''_1, M''_1) → Q''_1, b''_1, g'_2, l''_2, d''_1, m''_1
  44. Rotate(J, γ, G) → J'
  45. Rotate(M', γ, G) → M''_2
  46. Rotate(B, γ, G) → B'_1
  47. Polygon(J', M''_2, B'_1) → S', b'_1, j', m''_2
  48. Angle(J', M''_1, D''_1) → δ
  49. Rotate(J', ε, M''_1) → J''
  50. Rotate(M''_2, ε, M''_1) → M''_2'
  51. Rotate(B'_1, ε, M''_1) → B'_1'
  52. Polygon(J'', M''_2', B'_1') → S'', b'_1', j'', m''_2'
  53. Line(C, J) → h
  54. Line(B, M) → n
  55. Intersect(n, h) → U
  56. Angle(B, U, J) → ζ
  57. Rotate(B''', η, U) → B''''
  58. Rotate(G'_1'', η, U) → G'_1'''
  59. Rotate(L''', η, U) → L''''
  60. Rotate(D''', η, U) → D''''
  61. Rotate(M''', η, U) → M''''
  62. Polygon(B'''', G'_1''', L'''', D'''', M'''') → Q'''', b'''', g'_1''', l'''', d'''', m''''
  63. Rotate(B'', θ, U) → B'''_1
  64. Rotate(G'_1', θ, U) → G'_3
  65. Rotate(L'', θ, U) → L'''_1
  66. Rotate(D'', θ, U) → D'''_1
  67. Rotate(M'', θ, U) → M'''_1
  68. Polygon(B'''_1, G'_3, L'''_1, D'''_1, M'''_1) → Q'''_1, b'''_1, g'_3, l'''_1, d'''_1, m'''_1
  69. Rotate(B'''_1, o, G'_1''') → B'''_1'
  70. Rotate(G'_3, o, G'_1''') → G'_3'
  71. Rotate(L'''_1, o, G'_1''') → L'''_1'
  72. Rotate(D'''_1, o, G'_1''') → D'''_1'
  73. Rotate(M'''_1, o, G'_1''') → M'''_1'
  74. Polygon(B'''_1', G'_3', L'''_1', D'''_1', M'''_1') → Q'''_1', b'''_1', g'_3', l'''_1', d'''_1', m'''_1'
  75. Angle(A, U, M) → ι
  76. Rotate(A, κ, U) → A'
  77. Rotate(L'', κ, U) → L'''_2
  78. Rotate(P, κ, U) → P'
  79. Rotate(E, κ, U) → E'
  80. Rotate(I, κ, U) → I'
  81. Rotate(G, κ, U) → G'
  82. Rotate(L', κ, U) → L''_2
  83. Polygon(A', L'''_2, P', E', I', G', L''_2) → R', a', l'''_2, p', e', i', g', l''_3
  84. Translate(A', u) → A''
  85. Translate(L'''_2, u) → L'''_2'
  86. Translate(P', u) → P''
  87. Translate(E', u) → E''
  88. Translate(I', u) → I''
  89. Translate(G', u) → G''
  90. Translate(L''_2, u) → L''_2'
  91. Polygon(A'', L'''_2', P'', E'', I'', G'', L''_2') → R'', a'', l'''_2', p'', e'', i'', g'', l''_2'

AI Drawing Prompt Reference

Draw a regular dodecagon area graph, including a circle and multiple triangles and polygons, the graph contains multiple reflections and intersection points, need to calculate multiple angles and rotation angles, finally draw the area graph of the regular dodecagon.
The prompt above was compiled from the original drawing commands and is for reference only.