三角形中的高

GeoGebra 命令及参数

1. Segment(A, B) → f
2. Segment(B, C) → g
3. Segment(C, A) → h_4
4. Point(h_4) → D
5. Line(D, f) → i
6. Intersect(i, g) → E_1
7. Segment(E_1, B) → j
8. Point(j) → F_1
9. Line(F_1, h_4) → k
10. Intersect(k, f) → E
11. Intersect(i, k) → F
12. Line(C, B) → l
13. OrthogonalLine(A, l) → m
14. Intersect(l, m) → G
15. Segment(A, G) → h
16. OrthogonalLine(D, l) → n
17. Intersect(l, n) → H
18. Segment(D, H) → h_1
19. OrthogonalLine(F, l) → p
20. Intersect(p, l) → I
21. Segment(F, I) → h_2
22. OrthogonalLine(E, l) → q
23. Intersect(q, l) → J
24. Segment(E, J) → h_3
25. Segment(E, F) → r
26. Segment(D, F) → s
27. Polygon(D, E_1, C) → t1, c, d, e_1
28. Polygon(E_1, F_1, F) → t2, f_1, e_2, f_2
29. Polygon(E, B, F_1) → t3, f_3, e, b