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Lines of Symmetry - Square

Lines of Symmetry - Square
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2016-07-28 23:35
PolygonTransformationGeometric Construction
This example demonstrates the symmetry axes of a square. It involves core mathematical concepts such as symmetry, geometric construction, midpoint, line segments, and reflection. GeoGebra commands like Polygon, Line, LineBisector, Intersect, Mirror, Midpoint, Segment, and If are used to construct the figure. It is suitable for middle school and high school students learning geometric transformations, symmetry, and construction techniques, as well as for high school mathematics instruction.

GeoGebra Commands & Parameters

  1. Polygon(A, B, C, D) → poly1, a_1, b_1, d_1, c_1
  2. Line(C, B) → j
  3. Line(D, C) → k
  4. Line(A, B) → l
  5. Line(D, A) → m
  6. LineBisector(M, C) → c
  7. Intersect(c, k) → F_1
  8. Intersect(c, l) → G
  9. Intersect(c, m) → H
  10. Intersect(j, c) → I
  11. Mirror(B, c) → B'
  12. Mirror(D, c) → D'
  13. Mirror(A, c) → A'
  14. Polygon(M, F_1, I) → poly2, i, e, f
  15. Polygon(F_1, D, A, B, I) → poly3, f_1, d, a_2, b_2, i_1
  16. Polygon(F_1, M, B', G) → poly4, f_2, e_1, b', g
  17. Polygon(F_1, D, A, G) → poly5, f_3, d_2, a_3, g_1
  18. Polygon(F_1, M, B', A', H) → poly6, f_4, e_2, b'_1, a', h
  19. Polygon(F_1, D, H) → poly7, h_1, f_5, d_3
  20. Polygon(H, D', M, I) → poly8, h_2, d', e_3, i_2
  21. Polygon(H, A, B, I) → poly9, h_3, a_4, b_3, i_3
  22. Polygon(H, D', M, B', G) → poly10, h_4, d'_1, e_4, b'_2, g_2
  23. Polygon(H, A, G) → poly11, g_3, h_5, a_5
  24. Polygon(G, B, I) → poly13, i_4, g_4, b_4
  25. Polygon(G, A', D', M, I) → poly12, n, p, q, r, s
  26. Midpoint(D, C) → E
  27. Midpoint(A, B) → F
  28. Segment(E, F) → t
  29. If(Distance[M, D] ≤ 0.05, 1, 0) → ok
  30. Midpoint(C, M) → J
  31. Midpoint(b_1) → K
  32. Midpoint(c_1) → L
  33. Line(L, K) → a1
  34. Line(E, F) → b1
  35. Line(D, B) → b
  36. Line(D, B) → c1
  37. Line(C, A) → d1

AI Drawing Prompt Reference

Draw a square and display its lines of symmetry. First, draw the four sides of the square. Then, find the midpoint of each side and connect them to form the symmetry axes. Reflect each vertex of the square over the symmetry axes to get new vertices. Finally, draw several smaller squares using these new vertices to demonstrate the symmetry.
The prompt above was compiled from the original drawing commands and is for reference only.