欧拉线探索

GeoGebra 命令及参数

1. Polygon(A, B, C) → poly1, c, a, b
2. OrthogonalLine(C, c) → f
3. OrthogonalLine(B, b) → g
4. OrthogonalLine(A, a) → h
5. Intersect(f, g) → D
6. Midpoint(A, B) → E
7. Midpoint(C, B) → F
8. Midpoint(C, A) → G
9. Line(C, E) → i
10. Line(B, G) → j
11. Line(A, F) → k
12. Intersect(i, j) → H
13. OrthogonalLine(E, c) → l
14. OrthogonalLine(F, a) → m
15. OrthogonalLine(G, b) → n
16. Intersect(l, m) → K
17. Intersect(l, m) → L
18. Intersect(m, n) → M
19. Line(D, H) → p