相似三角形中的线段

GeoGebra 命令及参数

1. Polygon(A, B, C) → poly1, c, a, b
2. Line(D, B) → d
3. Line(D, A) → e
4. Line(D, C) → f
5. Point(f) → E
6. Line(E, b) → g
7. Intersect(e, g) → F
8. Line(F, c) → h
9. Intersect(d, h) → G
10. Line(G, E) → i
11. Segment(F, G) → j
12. Segment(G, E) → k
13. Segment(E, F) → l
14. AngularBisector(B, A, C) → m
15. AngularBisector(G, F, E) → n
16. Intersect(n, k) → I
17. Intersect(m, a) → H
18. Segment(A, H) → anglebisector_1
19. Segment(F, I) → anglebisector_2
20. Midpoint(B, C) → J
21. Midpoint(G, E) → K
22. Segment(J, A) → median_1
23. Segment(K, F) → median_2
24. OrthogonalLine(A, a) → p
25. OrthogonalLine(F, k) → q
26. Intersect(p, a) → L
27. Intersect(q, k) → M
28. Line(B, C) → r
29. OrthogonalLine(A, r) → s
30. Intersect(r, s) → N
31. Line(G, E) → t
32. OrthogonalLine(F, t) → a_1
33. Intersect(t, a_1) → O
34. Segment(A, N) → altitude_1
35. Segment(F, O) → altitude_2