斜率与路标

GeoGebra 命令及参数

1. Point(xAxis) → B
2. OrthogonalLine(B, xAxis) → f
3. Point(f) → A11
4. Vector(A2, A11) → u
5. FitPoly(L_1, 8) → g
6. Segment((0, 0), (100, 0)) → h
7. Segment((100, 0), A11) → i
8. OrthogonalLine(A, yAxis) → j
9. Point(j) → C
10. Polygon(A, C, 3) → poly1, k, l, m, D
11. OrthogonalLine(C, xAxis) → n
12. OrthogonalLine(C, l) → p
13. OrthogonalLine(D, l) → q
14. OrthogonalLine(D, m) → r
15. OrthogonalLine(A, m) → s
16. Circle(A, a) → c
17. OrthogonalLine(A, xAxis) → t
18. Intersect(c, t, 1) → E
19. Intersect(c, s, 1) → F
20. Circle(D, a) → d
21. Intersect(d, r, 1) → G
22. Intersect(d, q, 1) → H
23. Circle(C, a) → e
24. Intersect(e, p, 1) → I
25. Intersect(e, n, 1) → J
26. Polygon(E, J, C, A) → q1, e_1, j_1, c_1, a_1
27. Polygon(C, I, H, D) → q2, c_2, i_1, h_1, d_1
28. Polygon(A, D, G, F) → q3, a_2, d_2, g_1, f_1
29. CircleSector(C, J, I) → k_1
30. CircleSector(D, H, G) → p_1
31. CircleSector(A, F, E) → q_1
32. CurveCartesian(t, g(t), t, x(A1), x(A12)) → b
33. Midpoint(A, D) → K
34. Midpoint(D, C) → L
35. Polygon(A, K, C) → t1, c_3, a_3, k_2
36. Polygon(A, C, L) → t2, l_1, a_4, c_4
37. RotateText(text3, π / 6) → text4
38. RotateText(text3, ((-π)) / 6) → text5
39. Midpoint(i) → M