三角形中点与反射线段

GeoGebra 命令及参数

1. Polygon(A, B, C) → poly1, c, a, b
2. AngularBisector(a, b) → f, g
3. Mirror(B, f) → B'
4. AngularBisector(a, c) → h, i
5. Mirror(C, h) → C'_1
6. Mirror(A, h) → A'_1
7. AngularBisector(b, c) → j, k
8. Mirror(B, j) → B'_1
9. Segment(A2, A2 + (t4 * (B3 - A2))) → q
10. Mirror(C, j) → C'
11. Mirror(A, f) → A'
12. Segment(C3, C3 + (t4 * (A1 - C3))) → r
13. Polygon(A1, B1, C) → poly2, c_1, a1, b1
14. Midpoint(b) → E
15. Midpoint(a) → F
16. Midpoint(c) → G
17. Polygon(A2, B, C2) → poly3, c2, a2, b_1
18. Polygon(A, B3, C3) → poly4, c3, a_1, b3
19. Midpoint(q) → D
20. Segment(B1, B1 + (t4 * (C2 - B1))) → p
21. Midpoint(p) → H
22. Midpoint(r) → I
23. Ray(I, E) → s
24. Ray(D, G) → t
25. Intersect(t, s) → J
26. Segment(I, I + (t6 * (J - I))) → l
27. Segment(D, D + (t6 * (J - D))) → n_1
28. Segment(H, H + (t6 * (J - H))) → m