常见误解1

GeoGebra 命令及参数

1. Polygon(A, B, C, D) → poly1, a, b, c, d
2. Polygon(E, F, G, H) → poly2, e, f, g, h
3. Line(E, A) → i
4. Line(F, B) → j
5. Line(H, D) → k
6. Line(C, G) → l
7. Polygon(I, J, K, L) → poly3, i_1, j_1, k_1, l_1
8. Dilate(I, 2, M) → I'
9. Dilate(J, 2, M) → J'
10. Dilate(K, 2, M) → K'
11. Dilate(L, 2, M) → L'
12. Polygon(I', J', K', L') → poly3', i', j', k', l'
13. Line(I', I) → n
14. Line(L', L) → p
15. Point(l_1) → N
16. Segment(N, O) → q
17. Point(k_1) → P
18. Point(k') → Q
19. Segment(P, Q) → r
20. Point(j_1) → R
21. Point(j') → S
22. Segment(R, S) → s
23. Point(i_1) → T
24. Point(i') → U
25. Segment(T, U) → t
26. Point(a) → V
27. Point(e) → W
28. Segment(V, W) → a_1
29. Point(b) → Z
30. Point(f) → A_1
31. Segment(Z, A_1) → b_1
32. Point(c) → B_1
33. Point(g) → C_1
34. Segment(B_1, C_1) → c_1
35. Point(d) → D_1
36. Point(h) → E_1
37. Segment(D_1, E_1) → d_1
38. Line(K', I) → e_1
39. Line(J', L') → f_1