秋千运动

GeoGebra 命令及参数

1. Rotate(F, a°, A) → F'
2. Segment(F', A) → g
3. Circle(A, B) → c
4. Point(c) → E
5. Semicircle(E, B) → d
6. Line(A, B) → f
7. Angle(F, A, F') → α
8. Ray(A, F') → j
9. Point(j) → D
10. OrthogonalLine(D, j) → k
11. Point(k) → H
12. Segment(D, H) → l
13. Point(k) → I
14. OrthogonalLine(I, k) → n
15. Polygon(B, C, G) → t1, g_1, b, c_1
16. Polygon(E, J, K) → t2, k_1, e, j_1
17. Segment(B, E) → h
18. Point(yAxis) → L
19. OrthogonalLine(L, xAxis) → m
20. OrthogonalLine(L, m) → p
21. Intersect(m, g) → M
22. Segment(L, M) → q