双水壶问题（难度可选）

GeoGebra 命令及参数

1. Polygon((10, -5), (14, -5), (14, 0), (10, 0)) → qdump, m, n, p, q
2. Polygon(A_1, B_1, C_1, D_1) → q1, a, b, c, d
3. Point(b, f1) → F_1
4. PathParameter(F_1) → e
5. Point(d, 1 - f1) → E_1
6. Polygon(A_1, B_1, F_1, E_1) → j1, a_1, b_1, f, e_1
7. Polygon(A_2, B_2, C_2, D_2) → q2, a_2, b_2, c_2, d_2
8. Point(b_2, f2) → F_2
9. Point(d_2, 1 - f2) → E_2
10. Polygon(A_2, B_2, F_2, E_2) → j2, g, h, f_2, e_2
11. Polygon(A, B, C, D) → q3, a_3, b_3, c_1, d_1
12. Polygon(Corner[1, 1], Corner[1, 2], Corner[1, 3], Corner[1, 4]) → qall, i, j, k, l
13. If(v1 ≟ Element[listVolumeToObtain, SelectedIndex[listLevels]] ∨ v2 ≟ Element[listVolumeToObtain, SelectedIndex[listLevels]], true, false) → success
14. Point(n, (fout * 0.2)) → F_d
15. Point(q, 1 - (fout * 0.2)) → E_d
16. Polygon((10, -5), (14, -5), F_d, E_d) → qdwater, r, s, f_d, e_d
17. Segment((0, 0), (10, 0)) → t