用方程表示情境

GeoGebra 命令及参数

1. Point(yAxis) → A
2. Midpoint(A, B) → G_1
3. Polygon(C, D, F_1, E) → poly1, h, d, f, e
4. Textfield(a) → InputBox1
5. Textfield(b) → InputBox2
6. Textfield(c) → InputBox3
7. Polygon(H_1, I_1, J, K) → poly2, h_1, i, j, k
8. Point(xAxis) → L
9. Circle(L, abs(a) / 10) → g
10. Intersect(g, xAxis) → M, N
11. Rotate(M, 90°, L) → Q
12. Vector(L, Q) → u
13. Rotate(N, 90°, L) → P
14. Vector(L, P) → v
15. Vector(O, S) → w
16. Vector(R, T) → l
17. Textfield(q) → InputBox4