三角形重心活动

GeoGebra 命令及参数

1. Segment(A, B) → f
2. Segment(B, C) → g
3. Segment(C, A) → h
4. Midpoint(B, A) → M1
5. Midpoint(A, C) → M2
6. Midpoint(B, C) → M3
7. Segment(M1, C) → i
8. Segment(A, M3) → j
9. Segment(B, M2) → k
10. Intersect(i, j) → D
11. OrthogonalLine(D, f) → l
12. OrthogonalLine(D, h) → m
13. OrthogonalLine(D, g) → n
14. Intersect(l, f) → E
15. Intersect(m, h) → F
16. Intersect(n, g) → G
17. Segment(E, D) → p
18. Segment(D, F) → q
19. Segment(D, G) → r
20. Polygon(M1, D, A) → t1, a, m1, d
21. Polygon(B, M1, D) → t2, d_1, b, s
22. Polygon(A, D, M2) → t3, m2, a_1, d_2
23. Polygon(M2, D, C) → t4, c, t, d_3
24. Polygon(C, M3, D) → t5, d_4, c_1, m3
25. Polygon(B, M3, D) → t6, d_5, b_1, e
26. Distance(A, C) → distanceAC
27. Distance(B, C) → distanceBC
28. Distance(B, A) → distanceBA