二维向量与平行四边形动画构造

GeoGebra 命令及参数

1. Line(A, B) → d
2. Point(d) → C
3. Circle(C, a) → c
4. Circle(C, b) → e
5. Intersect(c, d) → D, E
6. Intersect(e, d) → F, G
7. Circle(G, D) → f
8. Circle(F, E) → g
9. Intersect(f, g) → H, I, ,
10. Angle(G, C, I) → α
11. Rotate(E, (s1 * t), C) → E'
12. Rotate(G, (s2 * t), C) → G'
13. Rotate(E, (s3 * t), F) → E''
14. Rotate(D, (s4 * t), G) → D'
15. CircleArc(C, E, E') → k
16. CircleArc(C, G, G') → p
17. CircleArc(F, E, E'') → q
18. CircleArc(G, D, D') → r
19. Translate(I, Vector[(s5 * Vector[I + (0, 0.25), H - (0, 0.25)])]) → I'
20. Translate(P, Vector[(s5 * Vector[P, Q])]) → P'
21. Segment(P, P') → h