平面的旋转

GeoGebra 命令及参数

1. Point(g) → D
2. Segment(C, D) → h
3. Polygon(B, A, E) → t1, e, b, a
4. Midpoint(B, A) → F
5. Midpoint(A, E) → G
6. Midpoint(B, E) → H
7. Midpoint(B, H) → I
8. Midpoint(H, E) → J
9. Line(J, G) → k
10. Line(A, k) → l
11. Line(F, l) → m
12. Line(E, k) → n
13. Line(B, m) → p
14. OrthogonalLine(A, n) → f
15. Point(f) → K
16. Segment(A, K) → i
17. Circle(A, Segment[C, D]) → c
18. Intersect(c, l, 2) → L
19. Circle(L, Segment[D, C]) → d
20. Intersect(d, l, 2) → M
21. Intersect(n, f) → N
22. Polygon(N, M, A) → t2, a_1, n_1, m_1
23. Circle(N, M) → q
24. Intersect(q, f, 1) → O
25. CircleArc(N, O, M) → r
26. Segment(O, K) → j
27. Line(B, A) → s
28. Intersect(n, s) → P
29. Segment(P, A) → t
30. Line(P, O) → f_1
31. OrthogonalLine(B, n) → g_1
32. Intersect(f_1, g_1) → Q
33. Segment(P, Q) → h_1
34. Segment(Q, B) → i_1
35. Polygon(E, O, Q) → t3, q_1, e_1, o