四色游戏的几何连线与中点构造

GeoGebra 命令及参数

1. PolyLine(A_3, B_3, K_2, L_2, M, N, O, P, Q, R, S, T, C_1, U, V, W, Z, A_1, B_1, D_1, E_1, F_3, G_1, H_1, I_1, J_2) → f
2. Midpoint(O_1, P_1) → Q_1
3. Segment(Q_1, P_1) → i
4. Midpoint(R_1, S_1) → T_1
5. Segment(T_1, R_1) → j
6. Midpoint(U_1, V_1) → W_1
7. Segment(U_1, W_1) → l
8. Midpoint(Z_1, A_2) → B_2
9. Segment(Z_1, B_2) → m
10. Midpoint(C_2, D_2) → E_2
11. Midpoint(F_2, G_2) → H_2
12. Segment(F_2, H_2) → n
13. Segment(C_2, E_2) → a
14. Point(f) → J
15. Circle(J, 0.5) → c
16. Point(f) → K
17. Circle(K, 0.5) → d
18. Point(f) → L
19. Circle(L, 0.5) → e
20. Point(f) → G
21. Circle(G, 0.5) → g
22. Point(f) → H
23. Circle(H, 0.5) → h
24. Point(f) → I
25. Circle(I, 0.5) → k
26. Point(f) → F
27. Circle(F, 0.5) → p
28. Point(f) → E
29. Circle(E, 0.5) → q
30. Point(f) → D
31. Circle(D, 0.5) → r
32. Point(f) → A
33. Circle(A, 0.5) → s
34. Point(f) → B
35. Circle(B, 0.5) → t
36. Point(f) → C
37. Circle(C, 0.5) → c_1