梯形角平分线演示

GeoGebra 命令及参数

1. Line(A_1, B_1) → a
2. Line(C_1, a) → b
3. Point(a) → B
4. Point(a) → A
5. Point(b) → D
6. Point(b) → C
7. Segment(A, B) → c
8. Segment(B, C) → d
9. Segment(C, D) → e
10. Segment(D, A) → f
11. AngularBisector(c, d) → g, h
12. AngularBisector(d, e) → i, j
13. AngularBisector(e, f) → k, l
14. AngularBisector(f, c) → m, n
15. Intersect(j, l) → O
16. Intersect(h, j) → P
17. Intersect(h, n) → N
18. Intersect(l, n) → M
19. Angle(N, M, O) → α
20. Angle(O, P, N) → β
21. Angle(M, O, P) → γ
22. Angle(P, N, M) → δ
23. Angle(D, A, B) → ε
24. Angle(C, D, A) → ζ
25. Angle(A, B, C) → η
26. Angle(B, C, D) → θ
27. Segment(M, P) → p
28. Segment(O, N) → q