利用相似三角形生成树的动态演示

GeoGebra 命令及参数

1. Point(xAxis) → A
2. Point(xAxis) → B
3. Line(A, yAxis) → a
4. Point(a) → MakeTreeGrow
5. Line(D, b) → c
6. Point(c) → E
7. Point(xAxis) → F
8. Point(xAxis) → G
9. Line(F, G) → d
10. Intersect(c, d) → H
11. Ray(H, E) → e
12. Point(d) → J
13. Polygon(E, H, J, I) → poly2, e_1, h_1, j, i
14. Polygon(D, R, H) → poly1, h, d_1, r
15. OrthogonalLine(E, d) → f
16. Intersect(d, f) → C
17. Polygon(E, C, R, D) → poly3, e_2, c_1, r_1, d_2
18. Point(d) → K
19. Point(d) → M
20. Polygon(L, K, M) → poly4, m, l, k