矩形周长演示 by Delise Andrews

GeoGebra 命令及参数

1. Point(Circle[A, 5]) → B
2. Segment(A, B) → a
3. Rotate(A, (-α), B) → A'
4. Angle(A', B, A) → β
5. Ray(B, A') → b
6. Circle(B, 3) → c
7. Intersect(c, b, 1) → C
8. Segment(B, C) → d
9. Rotate(B, (-α), C) → B'
10. Angle(B', C, B) → γ
11. Ray(C, B') → e
12. Circle(C, 5) → f
13. Intersect(f, e, 1) → D
14. Segment(C, D) → g
15. Rotate(C, (-α), D) → C'
16. Angle(C', D, C) → δ
17. Ray(D, C') → h
18. Circle(D, 3) → k
19. Intersect(k, h, 1) → E
20. Segment(D, E) → i