三角形垂心 by Sharri Sandler

GeoGebra 命令及参数

1. Polygon(A, B, C) → t1, c, a, b
2. OrthogonalLine(A, a) → f
3. OrthogonalLine(B, b) → g
4. OrthogonalLine(C, c) → h
5. Segment(A, B) → i
6. Segment(B, C) → j
7. Segment(A, C) → k
8. Polygon(D, E, F) → t2, f_1, d, e
9. OrthogonalLine(D, d) → l
10. OrthogonalLine(F, f_1) → m
11. OrthogonalLine(E, e) → n
12. Segment(D, E) → p
13. Segment(F, E) → q
14. Segment(D, F) → r
15. Polygon(G, H, I) → t3, i_1, g_1, h_1
16. Segment(G, H) → s
17. Segment(I, G) → t
18. Segment(I, H) → j_1
19. OrthogonalLine(G, g_1) → k_1
20. OrthogonalLine(I, i_1) → l_1
21. OrthogonalLine(H, h_1) → m_1