三角形的三条中线

GeoGebra 命令及参数

1. Point(h) → B
2. Point(g) → C
3. Point(h) → A
4. Polygon(A, B, C) → poly1, c, a, b
5. Midpoint(a) → D
6. Midpoint(b) → E
7. Midpoint(c) → F
8. Segment(C, F) → d
9. Segment(A, D) → e
10. Segment(B, E) → f
11. Intersect(d, e) → G
12. Segment(C, G) → i
13. Segment(G, F) → j
14. Segment(A, G) → k
15. Segment(G, D) → l
16. Segment(B, G) → m
17. Segment(G, E) → n
18. Polygon(D, C, G) → poly2, g_1, d_1, c_1
19. Polygon(G, C, E) → poly3, e_1, g_2, c_2
20. Polygon(G, E, A) → poly4, a_1, g_3, e_2
21. Polygon(G, F, A) → poly5, a_2, g_4, f_1
22. Polygon(G, D, B) → poly6, b_1, g_5, d_2
23. Polygon(G, F, B) → poly7, b_2, g_6, f_2
24. Segment(C, F) → q
25. Segment(E, B) → r
26. Segment(D, A) → s
27. Intersect(q, r) → H