比例关系测验：用几何作图理解线性比例

GeoGebra 命令及参数

1. PointIn(g_1) → D
2. Random(1, 15) → y_1
3. Random(1, 15) → x_1
4. Random(20, 75) → k
5. Dilate(B, If[0 < a ≤ 1, 1 - a, 0], A) → B'
6. Vector(B, B') → u
7. Dilate(A, If[2 < a ≤ 3, 3 - a, 0], (0, y(D))) → A'
8. Vector(A, A') → v
9. Dilate(A', If[3 < a ≤ 4, 4 - a, 0], D) → C'
10. Dilate(D, If[5 < a ≤ 6, 6 - a, 0], (x(D), y(D) + y(A'))) → D'
11. Dilate(D', If[6 < a ≤ 7, 7 - a, 0], (x(D') + x(D), y(D'))) → E'
12. Dilate(A, If[8 < a ≤ 9, 9 - a, 0], D) → A'_{1}
13. Segment(A, A'_{1}) → g
14. Dilate(D, If[9 < a ≤ 10, 10 - a, 0], E) → D'_{1}
15. Random(-10, 10) → b_1
16. Random(-10, 10) → n_1
17. Random(1, 10) → d_1
18. If(s ≥ 0, "earn", "lose") → text7
19. If(d > 1, "hours", "hour") → text8
20. Textfield(p) → InputBox3
21. Textfield(o) → InputBox1
22. If(o ≟ n_1 / d_1, "Yes!", "no") → text9
23. If(p ≟ q, "Yes!", "no") → text10
24. Vector(A', C') → w
25. Dilate(D, If[9 < a ≤ 10, 10 - a, 0], E') → D'_{2}
26. Segment(D, D'_{2}) → h
27. Textfield(p_1) → InputBox2
28. Textfield(q_1) → InputBox4
29. Textfield(k_1) → InputBox5
30. Textfield(m_1) → InputBox7
31. Textfield(o_1) → InputBox8
32. Textfield(l_1) → InputBox6
33. If(c1, "√", "×") → text21
34. If(c2, "√", "×") → text20
35. If(c3, "√", "×") → text22