相似直角三角形 by Susan Addington

GeoGebra 命令及参数

1. Point(xAxis) → A
2. Point(xAxis) → B
3. LineBisector(A, B) → g
4. Segment(A, B) → a
5. Intersect(g, a) → F
6. Semicircle(A, B) → c
7. Intersect(c, g, 1) → E
8. CircleArc(F, B, E) → h
9. Point(h) → C
10. Segment(C, B) → b
11. Segment(C, A) → d
12. OrthogonalLine(C, a) → e
13. Intersect(e, a) → D
14. Segment(C, D) → f
15. Polygon(C, D, B) → poly1, b_1, c', d_1
16. Rotate(C, rotate_1, D) → C'
17. Rotate(D, rotate_1, D) → D'
18. Rotate(B, rotate_1, D) → B'
19. Polygon(C', D', B') → poly1', b', c'_1, d'
20. Dilate(C', scale_1, D) → C''
21. Dilate(D', scale_1, D) → D''
22. Dilate(B', scale_1, D) → B''
23. Polygon(C'', D'', B'') → poly1'', b'', c'', d''
24. Angle(A, C, B) → α
25. Angle(B, A, C) → γ
26. Polygon(A, D, C) → poly2, c_1, a_1, d_2
27. Mirror(A, xAxis) → A'
28. Mirror(D, xAxis) → D'_1
29. Mirror(C, xAxis) → C'_1
30. Polygon(A', D'_1, C'_1) → poly2', c'_2, a', d'_1
31. Rotate(A', rotate, A) → A''
32. Rotate(D'_1, rotate, A) → G
33. Rotate(C'_1, rotate, A) → H
34. Polygon(A'', G, H) → poly2'', h_1, a'', g_1
35. Dilate(A'', scale, A) → A'''
36. Dilate(G, scale, A) → G'
37. Dilate(H, scale, A) → H'
38. Polygon(A''', G', H') → poly2''', h', a''', g'
39. Angle(A, C, D) → δ
40. Angle(D, C, B) → ε
41. Angle(C, B, D) → ζ
42. Angle(C, D, A) → η
43. Angle(B, D, C) → β