Mr. Geary 相似三角形演示

GeoGebra 命令及参数

1. Segment(A, B) → f
2. Segment(A, C) → g
3. Segment(C, B) → h
4. Angle(B, A, C) → α
5. Angle(C, B, A) → β
6. Angle(A, C, B) → γ
7. Point(Circle[D, (a * Distance[A, B])]) → E
8. Segment(D, E) → i
9. Rotate(E, Angle[B, A, C], D) → E'
10. Angle(E, D, E') → δ
11. Line(D, E') → j
12. Rotate(D, Angle[A, B, C], E) → D'
13. Angle(D, E, D') → ε
14. Line(E, D') → k
15. Intersect(j, k) → G
16. Segment(E, G) → l
17. Segment(G, D) → m
18. Angle(G, E, D) → ζ
19. Angle(D, G, E) → η
20. Distance(A, C) → AC
21. Distance(D, G) → DG
22. LaTeX(b, true, true) → text1
23. Distance(A, B) → AB
24. Distance(D, E) → DE
25. LaTeX(c, true, true) → text2
26. Distance(C, B) → CB
27. Distance(G, E) → GE
28. LaTeX(d, true, true) → text3