角-角相似定理演示

GeoGebra 命令及参数

1. Segment(A, B) → a
2. Rotate(B, α, A) → B'
3. Angle(B, A, B') → γ
4. Line(A, B') → b
5. Rotate(A, (-β), B) → A'
6. Angle(A', B, A) → δ
7. Line(A', B) → c
8. Intersect(b, c) → C
9. Polygon(A, B, C) → Tri_1, c_1, a_1, b_1
10. Segment(D, E) → d
11. Rotate(E, α, D) → E'
12. Angle(E, D, E') → ε
13. Line(E', D) → e
14. Rotate(D, (-β), E) → D'
15. Angle(D', E, D) → ζ
16. Line(D', E) → f
17. Intersect(e, f) → F
18. Polygon(F, E, D) → Tri_2, d_1, f_1, e_1
19. Segment(A, C) → h
20. Segment(B, C) → i
21. Segment(D, F) → j
22. Segment(F, E) → k
23. Angle(D, F, E) → η
24. Angle(A, C, B) → θ
25. Segment(E, F) → m
26. Segment(F, D) → n
27. Segment(B, C) → p
28. Segment(C, A) → q