梯形表面演示

GeoGebra 命令及参数

1. Intersect(xAxis, yAxis) → A_1
2. Point(xAxis) → D
3. Polygon(A_1, B, C, D) → q1, a, b, c, d
4. Segment(B, D) → f
5. Segment(C, A_1) → g
6. Intersect(f, g) → E
7. Polygon(B, E, A_1) → t1, a_1, b_1, e
8. Polygon(C, E, D) → t2, d_1, c_1, e_1
9. PointIn(t1) → Pointt1
10. PointIn(t2) → Pointt2
11. Segment(A, G) → h
12. Line(H, h) → i
13. Point(i) → I
14. Segment(A, H) → j
15. Segment(I, G) → k
16. Segment(H, G) → l
17. Segment(I, A) → m
18. Intersect(l, m) → F
19. Polygon(H, F, A) → t3, a_2, h_1, f_1
20. Polygon(I, F, G) → t4, g_1, i_1, f_2
21. PointIn(t3) → Pointt3_1
22. PointIn(t4) → Pointt4
23. PointIn(t3) → Pointt3
24. Segment(H, I) → n
25. Angle(G, H, I) → α
26. Angle(H, G, A) → β
27. Angle(G, A, I) → γ
28. Angle(H, I, A) → δ
29. Angle(m, l) → ε
30. Angle(I, F, H) → ζ