七巧板中的角

GeoGebra 命令及参数

1. Polygon(A, B, 4) → poli1, frame3, frame4, frame1, frame2, C, D
2. Segment(A, C) → frame12
3. Midpoint(D, C) → E
4. Midpoint(D, A) → F
5. Segment(F, E) → frame5
6. Midpoint(A, C) → G
7. Segment(B, G) → frame9
8. Midpoint(F, E) → H
9. Midpoint(G, C) → I
10. Segment(H, I) → frame7
11. Segment(G, H) → frame8
12. Line(F, frame8) → j
13. Intersect(j, frame12) → J
14. Segment(F, J) → frame11
15. Polygon(A, G, B) → poli2, b_1, a_1, g_1
16. Rotate(O + (a_1, 0), Angle[B - G] + Angle[O - N] - Angle[G - A], O) → P
17. Polygon(N, O, P) → poli4, p, n, o
18. Polygon(B, G, C) → poli3, c_1, b_2, g_2
19. Rotate(L + (b_2, 0), Angle[C - G] + Angle[L - K] - Angle[G - B], L) → M
20. Polygon(K, L, M) → poli5, m, k_1, l
21. Polygon(H, E, C, I) → poli6, h_1, e_1, c_2, i_1
22. Rotate(R + (e_1, 0), Angle[C - E] + Angle[R - Q] - Angle[E - H], R) → S
23. Rotate(S + (c_2, 0), Angle[I - C] + Angle[S - R] - Angle[C - E], S) → T
24. Polygon(Q, R, S, T) → poli7, q, r, s, t
25. Polygon(H, G, I) → poli8, i_2, h_2, g_3
26. Rotate(V + (h_2, 0), Angle[I - G] + Angle[V - U] - Angle[G - H], V) → W
27. Polygon(U, V, W) → poli9, w, u, v
28. Polygon(F, H, G, J) → poli10, f_1, h_3, g_4, j_1
29. Rotate(A_1 + (h_3, 0), Angle[G - H] + Angle[A_1 - Z] - Angle[H - F], A_1) → B_1
30. Rotate(B_1 + (g_4, 0), Angle[J - G] + Angle[B_1 - A_1] - Angle[G - H], B_1) → C_1
31. Polygon(Z, A_1, B_1, C_1) → poli11, z, a_2, b_3, c_3
32. Polygon(F, J, A) → poli12, a_3, f_2, j_2
33. Rotate(E_1 + (f_2, 0), Angle[A - J] + Angle[E_1 - D_1] - Angle[J - F], E_1) → F_1
34. Polygon(D_1, E_1, F_1) → poli13, f_3, d_1, e_2
35. Polygon(F, D, E) → poli14, e_3, f_4, d_2
36. Rotate(H_1 + (f_4, 0), Angle[E - D] + Angle[H_1 - G_1] - Angle[D - F], H_1) → I_1
37. Polygon(G_1, H_1, I_1) → poli15, i_3, g_5, h_4
38. InteriorAngles(poli7) → parA, parB, parC, parD
39. InteriorAngles(poli11) → quaA, quaB, quaC, quaD
40. InteriorAngles(poli5) → triGA, triGB, triGC
41. InteriorAngles(poli4) → triVA, triVB, triVC
42. InteriorAngles(poli15) → triAA, triAB, triAC
43. InteriorAngles(poli9) → triRA, triRB, triRC
44. InteriorAngles(poli13) → triPUC, triPUA, triPUB