拖动点观察几何性质

GeoGebra 命令及参数

1. Point(xAxis) → B
2. OrthogonalLine(B, xAxis) → a
3. Point(a) → C
4. Midpoint(C, B) → D
5. Polygon(B, C, E) → poly1, e, b, c
6. Intersect(xAxis, yAxis) → A
7. Polygon(A, B, 4) → poly2, d, f, g, h, F, G
8. Segment(A, F) → i
9. Segment(G, B) → j
10. OrthogonalLine(A, i) → k
11. OrthogonalLine(G, j) → l
12. Circle(A, Segment[C, E]) → p
13. Intersect(p, k, 1) → H
14. OrthogonalLine(H, k) → m
15. OrthogonalLine(F, i) → n
16. Circle(F, Radius[p]) → q
17. Circle(G, Radius[p]) → r
18. Intersect(r, l, 1) → I
19. Intersect(q, n, 2) → J
20. Line(G, A) → s
21. Line(A, B) → t
22. Line(F, G) → a_1
23. OrthogonalLine(J, n) → b_1
24. OrthogonalLine(I, l) → c_1
25. Intersect(b_1, a_1) → K
26. Intersect(s, c_1) → L
27. Intersect(m, t) → M
28. Polygon(F, J, K) → poly3, k_1, f_1, j_1
29. Polygon(G, I, L) → poly4, l_1, g_1, i_1
30. Polygon(A, H, M) → poly5, m_1, a_2, h_1
31. Polygon(I, H, 4) → poly6, d_1, e_1, n_1, p_1, N, O
32. Segment(A, C) → q_1