乘法分解：四数组可视化模型

GeoGebra 命令及参数

1. Intersect(xAxis, yAxis) → A
2. Point(xAxis) → B
3. Segment(A, B) → a
4. Point(yAxis) → C
5. Segment(A, C) → b
6. Point(b) → D
7. Segment(A, D) → c
8. Line(D, a) → d
9. Line(B, c) → e
10. Intersect(d, e) → E
11. Segment(D, E) → f
12. Segment(E, B) → g
13. Point(a) → F
14. Line(F, c) → h
15. Ray(A, B) → i
16. Point(i) → G
17. Segment(B, G) → j
18. Line(G, g) → k
19. Intersect(d, h) → H
20. Polygon(H, F, B, E) → poly1, h_1, f_1, b_1, e_1
21. Point(j) → I
22. Line(I, g) → l
23. Intersect(d, l) → J
24. Polygon(B, I, J, E) → poly2, b_2, i_1, j_1, e_2
25. Intersect(d, k) → K
26. Polygon(I, G, K, J) → poly3, i_2, g_1, k_1, j_2
27. Polygon(A, F, H, D) → poly4, a_1, f_2, h_2, d_1
28. Segment(D, A) → m
29. Segment(G, A) → n
30. Segment(G, K) → p
31. Segment(K, D) → q
32. Segment(H, F) → r
33. Segment(E, B) → s
34. Segment(J, I) → t
35. Distance(A, D) → distanceAD
36. Distance(D, H) → distanceDH
37. Distance(H, E) → distanceHE
38. Distance(E, J) → distanceEJ
39. Distance(J, K) → distanceJK
40. Intersect(m, n) → L
41. Intersect(p, q) → M
42. Polygon(D, L, G, M) → poly5, d_2, l_1, g_2, m_1
43. Area(D, L, G, M) → X