Hinged Dissection: Greek Cross to Square

Hinged Dissection: Greek Cross to Square
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2017-02-21 00:47
This example demonstrates how to transform a Greek cross into a square using hinged dissection. Key mathematical concepts include geometric transformations and polygons. It utilizes commands such as Polygon, Segment, OrthogonalLine, Intersect, and Rotate in GeoGebra. Suitable for middle school and above students to learn about geometric transformations and polygon-related knowledge.

GeoGebra Commands & Parameters

  1. Polygon(A, B, K, L, C, D, E, F, G, H, I, J) → poly1, a, j, k, l, b, c, d, e, f, g, h, i
  2. Segment(C, H) → m
  3. OrthogonalLine(H, m) → n
  4. Intersect(n, f) → M
  5. Intersect(n, j) → N
  6. Polygon(C, H, N, K, L, A, B) → poly2, c_1, h_1, n_1, k_1, l_1, a_1, b_1
  7. Polygon(C, D, E, F, M, H) → poly3, c_2, d_1, e_1, f_1, m_1, h_2
  8. Polygon(H, M, G) → poly4, g_1, h_3, m_2
  9. Polygon(H, I, J, N) → poly5, h_4, i_1, j_1, n_2
  10. Rotate(C, (π * o), N) → C'
  11. Rotate(H, (π * o), N) → H'
  12. Rotate(N, (π * o), N) → N'
  13. Rotate(K, (π * o), N) → K'
  14. Rotate(L, (π * o), N) → L'
  15. Rotate(A, (π * o), N) → A'
  16. Rotate(B, (π * o), N) → B'
  17. Polygon(C', H', N', K', L', A', B') → poly2', c', h', n', k', l', a', b'
  18. Rotate(Polygon[Rotate[C, (π * o), N], Rotate[D, (π * o), N], Rotate[E, (π * o), N], Rotate[F, (π * o), N], Rotate[M, (π * o), N], Rotate[H, (π * o), N]], ((3 * π / 2) * o), C') → poly6
  19. Rotate(Rotate[M, (π * o), N], ((3 * π / 2) * o), C') → O
  20. Rotate(Rotate[Polygon[Rotate[H, (π * o), N], Rotate[M, (π * o), N], Rotate[G, (π * o), N]], ((3 * π / 2) * o), C'], (π * o), O) → poly7

AI Drawing Prompt Reference

Draw a Greek cross and transform it into a square using hinged dissection to demonstrate geometric transformations. Start by creating the Greek cross, then identify key points and draw auxiliary lines. Use rotations and intersections to decompose the cross into several parts, and reassemble them into a square, showcasing geometric transformations and polygon concepts.
The prompt above was compiled from the original drawing commands and is for reference only.