三角形的特殊点和线

GeoGebra 命令及参数

1. Polygon(A, B, C) → poly1, c, a, b
2. AngularBisector(c, b) → d, e
3. Midpoint(a) → D
4. Line(A, D) → f
5. Intersect(e, a) → E
6. Segment(A, E) → g
7. Segment(A, D) → i
8. LineBisector(a) → k
9. OrthogonalLine(A, a) → m
10. Midpoint(a) → F
11. Line(C, B) → p
12. Intersect(m, p) → G
13. Intersect(a, g) → H
14. AngularBisector(A, C, B) → r
15. AngularBisector(C, B, A) → s
16. Intersect(r, c) → I
17. Intersect(s, b) → J
18. Segment(I, C) → t
19. Segment(J, B) → a_1
20. Intersect(t, a_1) → K
21. OrthogonalLine(K, c) → b_1
22. Intersect(b_1, c) → L
23. Circle(K, L) → c_1
24. LineBisector(c) → d_1
25. LineBisector(b) → e_1
26. Intersect(d_1, c) → M
27. Intersect(e_1, b) → N
28. Intersect(k, d_1) → O
29. Circle(O, A) → g_1
30. Midpoint(c) → P
31. Midpoint(b) → Q
32. Segment(B, Q) → j_1
33. Segment(C, P) → k_1
34. Intersect(i, j_1) → R
35. OrthogonalLine(B, b) → p_1
36. OrthogonalLine(C, c) → q_1
37. Intersect(p_1, q_1) → S