三角形变平行四边形

GeoGebra 命令及参数

1. Segment(B, C) → g
2. Segment(D, E) → i
3. Segment(E, F) → j
4. Segment(F, D) → k
5. OrthogonalLine(B, g) → f
6. Point(f) → A
7. OrthogonalLine(C, g) → h
8. Line(A, g) → l
9. Intersect(h, l) → G
10. Segment(A, G) → m
11. Point(m) → H
12. Midpoint(H, B) → I
13. Midpoint(H, C) → J
14. Polygon(I, J, C, B) → q1, i_1, j_1, c, b
15. OrthogonalLine(H, g) → n
16. OrthogonalLine(I, n) → p
17. Intersect(n, p) → L
18. Polygon(I, L, H) → t1, h_1, i_2, l_1
19. Polygon(L, H, J) → t2, j_2, l_2, h_2
20. Segment(H, B) → q
21. Segment(H, C) → r
22. Rotate(I, t°, I) → I'
23. Rotate(L, t°, I) → L'
24. Rotate(H, t°, I) → H'
25. Polygon(I', L', H') → t1', h', i', l'
26. Segment(H', L') → s
27. Segment(L', I) → a
28. Segment(I, H') → d
29. Rotate(L, (-(t°)), J) → L'_1
30. Rotate(H, (-(t°)), J) → H'_1
31. Rotate(J, (-(t°)), J) → J'
32. Polygon(L'_1, H'_1, J') → t2', j', l'_1, h'_1
33. Segment(L'_1, H'_1) → e
34. Segment(H'_1, J) → f_1
35. Segment(J, L'_1) → g_1
36. Segment(A, B) → k_1
37. Segment(G, C) → m_1
38. Midpoint(E, D) → K
39. Midpoint(E, F) → M
40. Polygon(K, M, E) → t3, e_1, k_2, m_2
41. Polygon(D, K, M, F) → q2, d_1, k_3, m_3, f_2
42. Rotate(K, (-(t°)), M) → K'
43. Rotate(M, (-(t°)), M) → M'
44. Rotate(E, (-(t°)), M) → E'
45. Polygon(K', M', E') → t3', e', k', m'
46. Segment(M, K') → n_1
47. Segment(K', E') → p_1
48. Segment(E', M) → q_1
49. Segment(I, J) → r_1
50. Segment(K, M) → s_1