等边三角形中的点 - 再探

GeoGebra 命令及参数

1. Polygon(A, B, 3) → poly1, a, b, c, C
2. OrthogonalLine(D, c) → d
3. OrthogonalLine(D, a) → e
4. OrthogonalLine(D, b) → f
5. Intersect(c, d) → E
6. Intersect(e, a) → F
7. Intersect(f, b) → G
8. Segment(D, E) → g
9. Segment(D, G) → h
10. Segment(D, F) → i
11. Segment(H, J) → j
12. Segment(J, K) → k
13. Segment(K, I) → l
14. Circle(J, j) → p
15. Circle(K, i) → q
16. Intersect(p, q) → L, M, ,
17. Segment(J, L) → m
18. Segment(K, L) → n
19. Segment(A, B) → r
20. Segment(B, C) → s
21. Segment(C, A) → t
22. Midpoint(r) → N
23. Midpoint(s) → O
24. Midpoint(t) → P
25. Segment(Q, R) → d_1
26. CircleArc(J, L, S) → e_1
27. Point(l) → T
28. CircleArc(K, T, L) → f_1
29. Point(e_1) → U
30. Point(f_1) → V
31. Segment(J, U) → g_1
32. Segment(K, V) → h_1
33. Vector(H, Q) → v
34. Vector(I, R) → w
35. Segment(Q, (x(J), -1)) → i_1
36. Segment((x(J), -1), (x(K), -1)) → j_1
37. Segment((x(K), -1), (x(I), -1)) → k_1
38. Polygon(J, K, L) → poly2, l_1, j_2, k_2
39. Polygon(O, P, N) → poly3, n_1, o_1, p_1