矩形周长公式的推导与演示

GeoGebra 命令及参数

1. Segment(A, B) → a
2. Segment(C, D) → b
3. Segment(A, C) → c
4. Segment(B, D) → d
5. Point(yAxis) → E
6. Segment(E, F) → e
7. Point(e) → G
8. Segment(G, H) → f
9. Point(f) → I
10. Segment(I, J) → g
11. Point(g) → K
12. Segment(K, L) → h
13. Point(yAxis) → M
14. Segment(M, N) → i
15. Segment(N, O) → j
16. Segment(O, P) → k
17. Segment(P, Q) → l
18. Segment(R, S) → t
19. Segment(T, U) → a_1
20. Segment(T, V) → b_1
21. Segment(V, W) → c_1
22. Segment(W, U) → d_1
23. Segment(Z, A_1) → e_1
24. Segment(Z, B_1) → f_1
25. Segment(B_1, C_1) → g_1
26. Segment(C_1, A_1) → h_1
27. Segment(D_1, E_1) → i_1
28. Segment(D_1, F_1) → j_1
29. Segment(F_1, G_1) → k_1
30. Segment(G_1, E_1) → l_1
31. Segment(H_1, I_1) → m_1
32. Segment(I_1, J_1) → n_1
33. Segment(J_1, K_1) → p_1
34. Segment(K_1, H_1) → q_1
35. Textfield(A1) → inputBox1
36. Textfield(A2) → inputBox2
37. Segment(N_1, O_1) → r_1
38. Segment(P_1, Q_1) → s_1
39. Segment(R_1, S_1) → t_1
40. Textfield(A3) → inputBox3
41. Textfield(A4) → inputBox4
42. Segment(T_1, U_1) → a_2