三角形中的平行四边形

GeoGebra 命令及参数

1. Segment(A, B) → f
2. Segment(B, C) → g
3. Segment(C, A) → h
4. Min({f, g, h}) → len
5. Segment(A, D) → i
6. Segment(B, E) → j
7. Segment(C, F) → k
8. Point(i) → G
9. Point(j) → H
10. Point(k) → K
11. Segment(A, A + (t2 * (G - A))) → l
12. Segment(B, B + (t2 * (H - B))) → m
13. Segment(C, C + (t2 * (K - C))) → n_2
14. Segment(A, A + (t3 * (F' - A))) → p
15. Segment(B, B + (t3 * (D' - B))) → q
16. Segment(C, C + (t3 * (E' - C))) → r
17. Line(D', f) → s
18. Line(H, g) → t
19. Intersect(s, t) → I
20. Segment(H, H + (t4 * (I - H))) → a
21. Segment(D', D' + (t4 * (I - D'))) → b
22. Line(G, f) → c
23. Line(F', h) → d
24. Intersect(c, d) → J
25. Segment(G, G + (t4 * (J - G))) → e
26. Segment(F', F' + (t4 * (J - F'))) → f_1
27. Line(K, h) → g_1
28. Line(E', g) → h_1
29. Intersect(g_1, h_1) → L
30. Segment(E', E' + (t4 * (L - E'))) → i_1
31. Segment(K, K + (t4 * (L - K))) → j_1
32. Ray(C, L) → k_1
33. Ray(A, J) → l_1
34. Intersect(k_1, l_1) → M
35. Segment(A, A + (t5 * (M - A))) → m_1
36. Segment(B, B + (t5 * (M - B))) → n_1
37. Segment(C, C + (t5 * (M - C))) → p_1