矩形周长与面积的动态探究

GeoGebra 命令及参数

1. Line(A, B) → f
2. Line(C, f) → g
3. Point(g) → D
4. OrthogonalLine(B, g) → h
5. Intersect(g, h) → E
6. OrthogonalLine(A, g) → i
7. Intersect(g, i) → F
8. Polygon(F, A, B, E) → poly1, f_1, a, b, e
9. Angle(B, A, F) → α
10. Angle(F, E, B) → β
11. Line(A_2, B_2) → f_4
12. Line(C_4, f_4) → g_2
13. Point(g_2) → D_2
14. OrthogonalLine(B_2, g_2) → h_2
15. Intersect(g_2, h_2) → E_2
16. OrthogonalLine(A_2, g_2) → i_2
17. Intersect(g_2, i_2) → F_2
18. Polygon(F_2, A_2, B_2, E_2) → poly1_2, f_5, a_2, b_2, e_2
19. Angle(B_2, A_2, F_2) → α_2
20. Angle(F_2, E_2, B_2) → β_2
21. Line(A_3, B_3) → f_6
22. Line(C_6, f_6) → g_3
23. Point(g_3) → D_3
24. OrthogonalLine(B_3, g_3) → h_3
25. Intersect(g_3, h_3) → E_3
26. OrthogonalLine(A_3, g_3) → i_3
27. Intersect(g_3, i_3) → F_3
28. Polygon(F_3, A_3, B_3, E_3) → poly1_3, f_7, a_3, b_3, e_3
29. Angle(B_3, A_3, F_3) → α_3
30. Angle(F_3, E_3, B_3) → β_3
31. Angle(A_2, F_2, E_2) → γ
32. Angle(E_2, B_2, A_2) → δ
33. Angle(A_3, F_3, E_3) → ε
34. Angle(E_3, B_3, A_3) → ζ