SAS三角形全等判定的动态几何演示

GeoGebra 命令及参数

1. Circle(A, a) → c
2. Circle(B, a) → d
3. Circle(A, b) → e
4. Circle(B, b) → f
5. Point(c) → D
6. Point(d) → E
7. Segment(A, D) → g
8. Segment(B, E) → h
9. Rotate(D, α, A) → D'
10. Angle(D, A, D') → β
11. Rotate(E, α, B) → E'
12. Angle(E, B, E') → γ
13. Segment(A, D') → i
14. Segment(B, E') → j
15. Intersect(e, i) → C,
16. Intersect(f, j) → F,
17. Segment(A, C) → k
18. Segment(C, D) → l
19. Segment(B, F) → m
20. Segment(F, E) → n
21. Segment(A, B) → p
22. Circle(A, ((a + b) * 0.15)) → q
23. Intersect(q, g) → G,
24. Intersect(i, k) → H
25. Intersect(q, k) → I,
26. CircleSector(A, G, I) → r
27. Dilate(D, If[0 < o ≤ 1, 1 - o, 0], E) → D'_1
28. Vector(D, D'_1) → u
29. Translate(A, u) → A'
30. Translate(D, u) → D'_2
31. Segment(A', D'_2) → g'
32. Line(A, h) → s
33. Angle(s, g) → δ
34. Rotate(A', If[1 < o ≤ 2, ((-(o - 1)) * δ), (-δ)], E) → A''
35. Rotate(D'_2, If[1 < o ≤ 2, ((-(o - 1)) * δ), (-δ)], E) → J
36. Segment(A'', J) → g''
37. Dilate(A, If[2 < o ≤ 3, 3 - o, 0], B) → A'_1
38. Vector(A, A'_1) → v
39. Translate(r, v) → r'
40. Translate(A, v) → A'_2
41. Translate(C, v) → C'
42. Segment(A'_2, C') → k'
43. Line(A, m) → t
44. Angle(t, k) → ε
45. Rotate(r', If[3 < o ≤ 4, ((-(o - 3)) * ε), (-ε)], B) → r''
46. Rotate(A'_2, If[3 < o ≤ 4, ((-(o - 3)) * ε), (-ε)], B) → K
47. Rotate(C', If[3 < o ≤ 4, ((-(o - 3)) * ε), (-ε)], B) → C''
48. Segment(K, C'') → k''
49. Dilate(A, If[4 < o ≤ 5, 5 - o, 0], B) → A'_3
50. Polygon(A, D, C) → t1, c_1, a_1, d_1
51. Polygon(B, E, F) → t2, f_1, b_1, e_1
52. Vector(A, A'_3) → w
53. Translate(A, w) → A'_4
54. Translate(D, w) → D'_3
55. Translate(C, w) → C'_1
56. Polygon(A'_4, D'_3, C'_1) → t1', c'_1, a'_4, d'_3
57. Rotate(A'_4, If[5 < o ≤ 6, ((-(o - 5)) * δ), (-δ)], B) → L
58. Rotate(D'_3, If[5 < o ≤ 6, ((-(o - 5)) * δ), (-δ)], B) → M
59. Rotate(C'_1, If[5 < o ≤ 6, ((-(o - 5)) * δ), (-δ)], B) → N
60. Polygon(L, M, N) → t1'', n_1, l_1, m_1