二次函数的领头系数与图像

GeoGebra 命令及参数

1. Polygon(A, B, C, D) → poly1, a_1, b_1, c_1, d_1
2. Midpoint(d_1) → E
3. Midpoint(b_1) → F
4. Midpoint(A, E) → G
5. Midpoint(B, F) → H
6. Midpoint(E, D) → I
7. Midpoint(F, C) → J
8. Point(a_1) → K
9. Point(c_1) → L
10. Point(a_1) → M
11. Point(c_1) → N
12. Midpoint(M, N) → R
13. Midpoint(M, R) → S
14. Midpoint(R, N) → T
15. Polygon(M, B, H, S) → poly2, m, b_2, h_1, s
16. Midpoint(K, L) → O
17. Midpoint(K, O) → P
18. Midpoint(O, L) → Q
19. Polygon(A, K, P, G) → poly3, a_2, k_1, p, g_1
20. Polygon(E, O, Q, I) → poly4, e_1, o, q, i
21. Polygon(R, F, J, T) → poly5, r, f_1, j, t
22. Segment(K, L) → n
23. Segment(M, N) → i_1
24. Segment(O, R) → j_1
25. Polygon(U, V, W, Z) → poly6, u_1, v_1, w_1, z_1