积分与多边形构造演示

GeoGebra 命令及参数

1. Polygon(A, B, C, D) → poly1, a, b, c, d
2. Line(B, B') → e
3. Line(A, e) → h
4. Point(h) → A'
5. Line(C, e) → f
6. Line(D, e) → g
7. Point(g) → D'
8. Point(f) → C'
9. Polygon(B', C', D', A') → poly2, e_1, g_1, f_1, h_1
10. Midpoint(b) → I
11. Midpoint(c) → J
12. Midpoint(d) → K
13. Midpoint(a) → L
14. Midpoint(e_1) → I'
15. Midpoint(g_1) → J'
16. Midpoint(f_1) → K'
17. Midpoint(h_1) → L'
18. Polygon(K, L, I, J) → poly3, k_1, l, i, j
19. Polygon(K', L', I', J') → poly4, o, p, m, n
20. Segment(A, C) → q
21. Segment(A', C') → r
22. Intersect(k_1, q) → Q
23. Intersect(i, q) → R
24. Line(R, h) → s
25. Line(Q, h) → t
26. Intersect(r, s) → R'
27. Intersect(r, t) → Q'
28. Polygon(K', Q', R', J') → poly5, o_1, t_1, s_1, n_1
29. Polygon(Q', L', I', R') → poly6, t_2, p_1, m_1, s_2
30. Polygon(K', L', Q') → poly7, t_3, o_2, p_2
31. Polygon(J', I', R') → poly8, s_3, n_2, m_2