垂直线及其斜率关系探索

GeoGebra 命令及参数

1. Line(A, B) → a
2. Point(a) → E
3. Intersect(f, g) →
4. Intersect(a, c) → F_1
5. Point(f) → H
6. Angle(c, a) → α
7. Point(f) → I
8. Slope(a) → m_1
9. Intersect(a, yAxis) → F
10. OrthogonalLine(E, a) → d
11. Angle(d, a) → γ
12. Point(d) → C
13. Point(d) → D
14. Line(C, D) → e
15. Slope(e) → m_2
16. Intersect(e, c) → L
17. Angle(c, e) → β
18. Intersect(e, yAxis) → D_1
19. Line(A, B) → a_1