线性方程应用：矩形周长问题

GeoGebra 命令及参数

1. Random(30, 90) → w
2. Random(2, 10) → b
3. Random(1, ((b - 1) * w) - 5) → a
4. Random(0, 1) → n
5. Textfield(c) → InputBox1
6. Textfield(d) → InputBox2
7. Polygon(A, B, D, C) → poly1, a_1, b_1, d_1, c_1
8. Segment(A, B) → j
9. Segment(B, D) → k
10. Segment(D, C) → l
11. Segment(C, A) → m
12. Angle(D, B, A) → α
13. Angle(B, A, C) → β
14. Angle(A, C, D) → γ
15. Angle(C, D, B) → δ
16. Distance(A, B) → distanceAB
17. Distance(A, j) → distanceAj
18. Distance(A, C) → distanceAC