矩形面积 by Chip Rollinson

GeoGebra 命令及参数

1. Point(a) → A
2. Point(b) → B
3. Intersect(c, d) → C
4. Intersect(a, f) → G
5. Intersect(b, e) → H
6. Polygon(B, C, A, D) → poly1, b_1, c_1, a_1, d_1
7. Intersect(d, e) → I
8. Polygon(C, E, F, I) → poly2, c_2, e_1, f_1, i
9. Polygon(H, I, C, B) → poly3, h, i_1, c_3, b_2
10. Polygon(C, E, G, A) → poly4, c_4, e_2, g, a_2
11. Segment(H, D) → j
12. Segment(D, G) → k
13. Segment(G, F) → l
14. Segment(F, H) → m
15. Segment(B, E) → n
16. Segment(A, I) → p
17. Segment(D, A) → q
18. Segment(D, B) → r
19. Segment(I, F) → s
20. Segment(F, E) → t
21. Segment(B, A) → g_1
22. Segment(D, C) → h_1
23. Segment(C, F) → j_1
24. Segment(I, E) → k_1
25. Intersect(j_1, k_1) → J
26. Intersect(g_1, h_1) → K
27. Segment(H, C) → l_1
28. Segment(B, I) → m_1
29. Segment(C, G) → n_1
30. Segment(A, E) → p_1
31. Intersect(n_1, p_1) → L
32. Intersect(l_1, m_1) → M
33. Segment(B, C) → q_1
34. Segment(C, A) → r_1