正弦曲线的对称性 by James Key

GeoGebra 命令及参数

1. Intersect(c, xAxis, 1) → J
2. Intersect(c, xAxis, 2) → D
3. Semicircle(J, D) → e
4. Point(e) → B
5. OrthogonalLine(B, xAxis) → b
6. Intersect(b, xAxis) → A
7. Segment(A, B) → d
8. CircleArc(O, D, B) → f
9. OrthogonalLine(E, xAxis) → g
10. Intersect(g, xAxis) → F
11. Segment(F, E) → h
12. Segment(G, F) → i
13. Segment(B, E) → q
14. Angle(D, O, B) → α
15. Segment(O, B) → a_2
16. Polygon(O, A, B) → poly1, b_1, a_1, c_1
17. Mirror(O, xAxis) → A'
18. Mirror(A, xAxis) → C'
19. Mirror(B, xAxis) → B'
20. Polygon(A', C', B') → poly1', b', a', c'
21. Segment(B', H) → j
22. OrthogonalLine(H, xAxis) → k
23. OrthogonalLine(H, xAxis) → l
24. Intersect(l, xAxis) → I
25. Segment(H, I) → m
26. CircleArc(O, B', D) → p
27. Segment(G, I) → n