Vargas-垂心

GeoGebra 命令及参数

1. Polygon(A, B, C) → t1, c, a, b
2. OrthogonalLine(B, b) → f
3. OrthogonalLine(C, c) → g
4. OrthogonalLine(A, a) → h
5. Intersect(f, g) → D
6. Polygon(E, F, G_1) → t2, g_1, e, f_1
7. OrthogonalLine(F, f_1) → i
8. OrthogonalLine(G_1, g_1) → j
9. OrthogonalLine(E, e) → k
10. Intersect(i, j) → H
11. Midpoint(g_1) → I
12. Midpoint(e) → J
13. Midpoint(f_1) → K
14. Segment(I, G_1) → l
15. Segment(J, E) → m
16. Segment(K, F) → n
17. Intersect(l, m) → G
18. Angle(E, F, G_1) → α
19. Angle(F, E, G_1) → β
20. Angle(E, F, G_1) → γ
21. Angle(E, G_1, F) → Altitudes
22. Angle(A, B, C) → δ