关于线的反射 by William Richards

GeoGebra 命令及参数

1. Polygon(A, B, C) → poly1_1, c_1, a_1, b_1
2. Textfield(B) → inputBoxB
3. Textfield(A) → inputBoxA
4. Textfield(C) → inputBoxC
5. Mirror(B, If[boolsi ≟ true, fsi, fstan]) → B'
6. Mirror(C, If[boolsi ≟ true, fsi, fstan]) → C'
7. Mirror(A, If[boolsi ≟ true, fsi, fstan]) → A'
8. Polygon(C', A', B') → poly1, b', c', a'
9. Midpoint(B, B') → B_v
10. Midpoint(C, C') → C_v
11. Midpoint(A, A') → A_v
12. Vector(B, B_v) → v_1
13. Vector(B', B_v) → v_2
14. Vector(C, C_v) → w_1
15. Vector(C', C_v) → w_2
16. Vector(A, A_v) → u_1
17. Vector(A', A_v) → u_2
18. Textfield(fstan) → inputfstan
19. Textfield(fsi) → inputfsi