三角形全等探索：通过几何作图理解三角形性质

GeoGebra 命令及参数

1. Point(Circle[A, 4]) → B
2. Segment(A, B) → a
3. Point(Circle[B, 3]) → D
4. Segment(B, D) → c
5. Polygon(A, B, D) → poly1, d, a_1, b
6. Point(Circle[C, 5]) → E
7. Segment(C, E) → e
8. Point(Circle[C, 4]) → F
9. Segment(C, F) → f
10. Point(Circle[E, 3]) → G
11. Segment(E, G) → g
12. Point(Circle[H, 3]) → I
13. Segment(H, I) → h
14. Rotate(H, -40*°, I) → H'
15. Angle(H', I, H) → α
16. Segment(I, H') → i
17. Point(Circle[J, 3]) → K
18. Segment(J, K) → j
19. Rotate(J, -40*°, K) → J'
20. Angle(J', K, J) → β
21. Segment(K, J') → k
22. Point(Circle[L, 3]) → M
23. Segment(L, M) → l
24. Point(Circle[L, 1.5]) → N
25. Segment(L, N) → m
26. Rotate(L, 25*°, M) → L'
27. Angle(L, M, L') → γ
28. Point(Circle[O, 3]) → P
29. Segment(O, P) → n
30. Point(Circle[O, 1.5]) → Q
31. Segment(O, Q) → p
32. Rotate(O, 25*°, P) → O'
33. Angle(O, P, O') → δ