二次函数图形 by STEP - המראה

GeoGebra 命令及参数

1. Line(C, xAxis) → i
2. Line(D, i) → j
3. Point(i) → E
4. OrthogonalLine(E, i) → k
5. Intersect(j, k) → F
6. Textfield(b) → InputBox1
7. Point(i) → H
8. OrthogonalLine(H, i) → l
9. Point(l) → I
10. OrthogonalLine(I, l) → q
11. Point(l) → J
12. OrthogonalLine(J, l) → r
13. Point(q) → L
14. OrthogonalLine(L, q) → s
15. Intersect(s, r) → M
16. Polygon(I, L, M, J) → poly1, i_1, l_1, m_1, j_1
17. Intersect(i, l_1) → N
18. Intersect(j, l_1) → O
19. Intersect(j_1, j) → P
20. Segment(H, N) → t_1
21. Segment(P, O) → c
22. Intersect(d, i_1) → Q
23. Intersect(m_1, d) → R
24. Segment(Q, R) → e
25. Textfield(t) → InputBox4
26. Textfield(a) → InputBox5
27. Textfield(a_1) → InputBox6
28. Textfield(text2) → InputBox2
29. Polygon((0, 0), (0, 100), (20, 100), (20, 0)) → q1, f_1, g_1, h_1, k_1
30. Textfield(text3) → InputBox3