平行四边形的几何作图 by GeoGebra Classroom Activities

GeoGebra 命令及参数

1. Point(xAxis) → A
2. Point(xAxis) → B
3. Line(C, xAxis) → a
4. Segment(A, B) → b
5. Segment(A, C) → c
6. Line(B, c) → d
7. Intersect(a, d) → D
8. Segment(C, D) → e
9. Segment(D, B) → f
10. OrthogonalLine(A, b) → g
11. Intersect(a, g) → E_2
12. Vector(A, A_1) → u
13. Polygon(A, E_2, C) → poly1, c_1, a_1, e_1
14. Translate(A, u) → E
15. Translate(E_2, u) → F
16. Translate(C, u) → G
17. Polygon(E, F, G) → poly1', c', a', e'
18. OrthogonalLine(B, a) → h
19. Intersect(a, h) → G_1
20. OrthogonalLine(D, a) → i
21. Intersect(i, xAxis) → I_1
22. Polygon(D, B, I_1) → poly2, i_1, d_1, b_1
23. Vector(B, B_1) → v
24. Translate(D, v) → H
25. Translate(B, v) → I
26. Translate(I_1, v) → J
27. Polygon(H, I, J) → poly2', i', d', b'
28. Intersect(a, g) → J_1
29. OrthogonalLine(C, j) → k
30. Intersect(j, k) → K_1
31. Polygon(E_2, C, K_1, A) → poly3, e_2, c_2, k_1, a_2
32. Vector(A, D_1) → l
33. Translate(E_2, l) → W
34. Translate(C, l) → X
35. Translate(K_1, l) → Y
36. Translate(A, l) → Z
37. Polygon(W, X, Y, Z) → poly3', e'_1, c'_2, k', a'_2
38. Polygon(K_1, I_1, D, C) → poly4, k_2, i_2, d_2, c_3
39. Vector(K_1, E_1) → w
40. Translate(K_1, w) → O
41. Translate(I_1, w) → P
42. Translate(D, w) → Q
43. Translate(C, w) → R
44. Polygon(O, P, Q, R) → poly4', k'_1, i'_1, d'_1, c'_1
45. Polygon(A, J_1, D, I_1) → poly5, a_3, j_1, d_3, i_3
46. Vector(A, F_1) → m
47. Translate(A, m) → S
48. Translate(J_1, m) → T
49. Translate(D, m) → U
50. Translate(I_1, m) → V
51. Polygon(S, T, U, V) → poly5', a'_1, j', d'_2, i'_2
52. Polygon(C, K_1, B, G_1) → poly6, c_4, k_3, b_2, g_1
53. Vector(B, C_1) → n
54. Translate(C, n) → K
55. Translate(K_1, n) → L
56. Translate(B, n) → M
57. Translate(G_1, n) → N
58. Polygon(K, L, M, N) → poly6', c'_3, k'_2, b'_1, g'
59. Polygon(A, B, D, C) → poly7, a_4, b_3, d_4, c_5