面积与周长关系演示

GeoGebra 命令及参数

1. Line((0, 0), (0, 1)) → yaxis
2. Point(yaxis) → A_1
3. OrthogonalLine(A_1, yAxis) → a
4. Point(a) → B_1
5. Segment(A_1, B_1) → b
6. Point(b) → C_1
7. Point(b) → D_1
8. Segment(A_1, C_1) → c
9. Segment(C_1, D_1) → d
10. Segment(D_1, B_1) → e
11. Vector(A_1, C_1) → u
12. Translate(A, u) → C
13. Segment(A, C) → f
14. Circle(A, d) → g
15. Circle(C, e) → h
16. Intersect(g, h, 1) → B
17. Polygon(A, B, C) → poly1, e', e_1, f_1
18. Distance(e', e_1) → i
19. Distance(c, f) → j
20. Distance(e, d) → k
21. OrthogonalLine(A_1, c) → l
22. OrthogonalLine(B_1, e) → m
23. Point(yaxis) → E_1
24. OrthogonalLine(E_1, l) → n
25. Intersect(m, n) → F_1
26. Segment(E_1, F_1) → p
27. Point(p) → G
28. Point(p) → H
29. Segment(E_1, G) → q
30. Segment(G, H) → r
31. Segment(H, F_1) → s
32. Vector(E_1, G) → v
33. Translate(D, v) → F
34. Circle(D, r) → t
35. Circle(F, s) → c_1
36. Intersect(t, c_1, 1) → E
37. Polygon(D, E, F) → poly2, i', i_1, j_1
38. Segment(E_1, G) → a_1
39. Perimeter(poly1) → perimeterpoly1
40. Perimeter(poly2) → perimeterpoly2
41. Distance(a_1, r) → o
42. Distance(s, e) → w
43. Distance(d, c) → z