正多边形周长代数

GeoGebra 命令及参数

1. Intersect(xAxis, yAxis) → A
2. Point(xAxis) → B
3. Segment(A, B) → f
4. Rotate(A, (-(108°)), B) → A'
5. Angle(A', B, A) → α
6. Segment(B, A') → g
7. Rotate(B, (-(108°)), A') → B'
8. Angle(B', A', B) → β
9. Segment(A', B') → h
10. Rotate(A', (-(108°)), B') → A''
11. Angle(A'', B', A') → γ
12. Segment(B', A'') → i
13. Rotate(B', (-(108°)), A'') → B''
14. Angle(B'', A'', B') → δ
15. Segment(A'', A) → j
16. Intersect(i, j) → C
17. Intersect(h, i) → D
18. Intersect(g, h) → E
19. Intersect(f, g) → F
20. Intersect(f, j) → G
21. Polygon(C, D, E, F, G) → poly1, c, d, e, f_1, g_1
22. Intersect(f, j) → H
23. Point(Circle[H, 1.5]) → I
24. Segment(H, I) → k
25. Rotate(H, 90°, I) → H'
26. Angle(H, I, H') → ε
27. Segment(I, H') → l
28. Rotate(I, 90°, H') → I'
29. Angle(I, H', I') → ζ
30. Polygon(H, I, H', I') → q1, h_1, i_1, h', i'
31. Intersect(i_1, h') → J
32. Point(Circle[J, 1.5]) → K
33. Segment(J, K) → m
34. Polygon(J, K, 4) → poly2, n, p, q, r, L, M
35. Intersect(f, g) → N
36. Intersect(n, p) → O
37. Intersect(n, p) → Q
38. Segment(Q, P) → s
39. Rotate(Q, 90°, P) → Q'
40. Angle(Q, P, Q') → η
41. Segment(P, Q') → t
42. Intersect(i_1, h') → R
43. Polygon(R, Q', P, Q) → q2, r_1, q', p_1, q_1
44. Intersect(f, g) → S
45. Point(s) → T
46. Segment(S, T) → a
47. Rotate(S, (-(108°)), T) → S'
48. Angle(S', T, S) → θ
49. Segment(T, S') → b
50. Rotate(T, 108°, S') → T'
51. Rotate(T, (-(108°)), S') → T'_1
52. Angle(T'_1, S', T) → ι
53. Segment(S', T'_1) → j_1
54. Rotate(S', (-(108°)), T'_1) → S''
55. Angle(S'', T'_1, S') → κ
56. Segment(T'_1, S'') → k_1
57. Segment(S'', S) → l_1
58. Polygon(S, S'', T'_1, S', T) → poly3, s_1, s'', t'_1, s', t_1