圆的各部分

GeoGebra 命令及参数

1. Circle(A, C) → circle
2. Point(circle) → U
3. Point(circle) → T
4. CircleArc(A, T, U) → d
5. Segment(T, U) → segCHORD
6. Midpoint(segCHORD) → Z
7. OrthogonalLine(Z, segCHORD) → d_2
8. Point(circle) → D
9. Segment(A, D) → RADIUS
10. Point(circle) → E
11. Ray(E, A) → a
12. Intersect(circle, a) → F, G
13. Segment(E, G) → DIAMETER
14. Circle(A, E) → circumference
15. Point(circle) → H
16. Point(circle) → I
17. CircleSector(A, H, I) → sector
18. Point(circle) → J
19. Ray(J, A) → b
20. Intersect(circle, b) → K, L
21. Segment(J, L) → semiCIRCLEdia
22. Semicircle(J, L) → semicircle
23. Point(circle) → M
24. Segment(A, M) → quadR_1
25. OrthogonalLine(A, quadR_1) → e
26. Intersect(circle, e) → N, O
27. Segment(O, A) → quadR_2
28. CircleSector(A, M, O) → quadrant
29. Angle(M, A, O) → α
30. Point(circle) → P
31. Point(circle) → Q
32. CircleArc(A, P, Q) → arc
33. Point(circle) → R
34. Point(circle) → S
35. Segment(R, S) → CHORD
36. Tangent(tangentPOINT, circle) → tangent, g
37. Ray(Z, A) → c
38. Intersect(d, d_2) → A_2,
39. Midpoint(A_2, U) → A_1
40. Midpoint(A_2, T) → B_1
41. Midpoint(T, B_1) → C_1
42. Midpoint(B_1, A_2) → D_1
43. Midpoint(A_2, A_1) → E_1
44. Midpoint(A_1, U) → F_1
45. Midpoint(U, F_1) → G_1
46. Midpoint(F_1, A_1) → H_1
47. Midpoint(A_1, E_1) → I_1
48. Midpoint(E_1, A_2) → J_1
49. Midpoint(A_2, D_1) → K_1
50. Midpoint(D_1, B_1) → L_1
51. Midpoint(B_1, C_1) → M_1
52. Midpoint(C_1, T) → N_1
53. Ray(Z, N_1) → f
54. Ray(Z, C_1) → h
55. Ray(Z, M_1) → i
56. Ray(Z, B_1) → j
57. Ray(Z, L_1) → k
58. Ray(Z, D_1) → l
59. Ray(Z, K_1) → m
60. Ray(Z, J_1) → n
61. Ray(Z, E_1) → p
62. Ray(Z, I_1) → q
63. Ray(Z, A_1) → r
64. Ray(Z, H_1) → s
65. Ray(Z, F_1) → t
66. Ray(Z, G_1) → a_1
67. Midpoint(T, N_1) → O_1
68. Midpoint(N_1, C_1) → P_1
69. Midpoint(U, G_1) → Q_1
70. Midpoint(G_1, F_1) → R_1
71. Ray(Z, O_1) → b_1
72. Ray(Z, P_1) → c_1
73. Ray(Z, R_1) → d_1
74. Ray(Z, Q_1) → e_1
75. Intersect(d, b_1) → S_1,
76. Intersect(d, f) → T_1,
77. Intersect(d, c_1) → U_1,
78. Intersect(d, h) → V_1,
79. Intersect(d, i) → W_1,
80. Intersect(d, j) → Z_1,
81. Intersect(d, k) → B_2,
82. Intersect(d, l) → C_2,
83. Intersect(d, m) → D_2,
84. Intersect(d, n) → E_2,
85. Intersect(d, p) → F_2,
86. Intersect(d, q) → G_2,
87. Intersect(d, r) → H_2,
88. Intersect(d, s) → I_2,
89. Intersect(d, t) → J_2,
90. Intersect(d, d_1) → K_2,
91. Intersect(d, a_1) → L_2,
92. Intersect(d, e_1) → M_2,
93. Polygon(U, M_2, A_2, D_2, C_2, B_2, Z_1, W_1, V_1, U_1, T_1, S_1, L_2, T, K_2, J_2, I_2, H_2, G_2, F_2, E_2) → poly1, u, e_2, a_2, d_3, c_2, b_2, z_1, w_1, v_1, u_1, t_1, m_2, s_1, t_2, l_2, k_2, j_2, i_2, h_2, g_2, f_2