轨迹入门

GeoGebra 命令及参数

1. LineBisector(B_1, C_1) → a_1
2. Point(a_1) → W
3. LineBisector(B_1, C_1) → j
4. Point(j) → Fixed
5. Line(C_1, Fixed) → f_1
6. Segment(Fixed, C_1) → k
7. OrthogonalLine(W, k) → p
8. Line(B_1, Fixed) → g_1
9. Segment(Fixed, B_1) → l
10. OrthogonalLine(W, l) → n
11. LineBisector(B, C) → a
12. Distance(F, G) → distanceFG
13. Ellipse(K, L, M) → c
14. Point(c) → N
15. Segment(K, N) → d
16. Segment(N, L) → e
17. Circle(A, distanceFG) → f
18. Point(f) → O
19. Segment(A, O) → g
20. Point(a) → P
21. Segment(B, P) → h
22. Segment(P, C) → i
23. Distance(i, h) → b
24. Segment(B_1, W) → h_1
25. Segment(W, C_1) → i_1
26. Distance(h_1, i_1) → b_1
27. LineBisector(B_1, C_1) → m
28. Ray(Fixed, B_1) → q
29. Ray(Fixed, C_1) → r
30. Intersect(n, g_1) → D
31. Segment(W, D) → s
32. Intersect(p, f_1) → E
33. Segment(W, E) → t
34. Segment(B_1, D) → c_1
35. Segment(C_1, E) → d_1
36. Angle(W, E, Fixed) → α
37. Angle(Fixed, D, W) → β
38. Midpoint(P, B) → I
39. Midpoint(P, C) → J
40. Midpoint(W, D) → Q
41. Midpoint(W, E) → R
42. Midpoint(A, O) → S