全等三角形，第一部分

GeoGebra 命令及参数

1. Polygon(A, B, C) → poly1, c, a, b
2. Circle(A, B) → d
3. Circle(A, C) → e
4. Intersect(d, f, 2) → E
5. Angle(E, A, B) → α
6. Point(g) → F
7. Rotate(F, α, A_1) → F'
8. Angle(F, A_1, F') → β
9. Ray(A_1, F') → h
10. Distance(A, B) → distanceAB
11. Circle(A_1, distanceAB) → k
12. Intersect(k, h, 1) → B_1
13. Angle(C, A, E) → γ
14. Rotate(F, (-γ), A_1) → F'_1
15. Angle(F'_1, A_1, F) → δ
16. Ray(A_1, F'_1) → i
17. Distance(A, C) → distanceAC
18. Circle(A_1, distanceAC) → p
19. Intersect(p, i, 1) → C_1
20. Polygon(A_1, B_1, C_1) → poly2, h_1, d_1, g_1
21. Circle(B_1, C_1, A_1) → q
22. Center(q) → D
23. Rotate(A_1, rotate, D) → A'
24. Rotate(B_1, rotate, D) → B'
25. Rotate(C_1, rotate, D) → C'
26. Polygon(A', B', C') → poly2', i_1, g_2, h_2
27. Line(B', C') → j
28. Mirror(A', j) → A''
29. Mirror(B', j) → B''
30. Mirror(C', j) → C''
31. Polygon(A'', B'', C'') → poly2'', c'', a'', b''