直角三角形中的比例关系

GeoGebra 命令及参数

1. Intersect(xAxis, yAxis) → A
2. Point(yAxis) → C
3. Point(xAxis) → B
4. Segment(C, A) → b
5. Segment(A, B) → a
6. Segment(B, C) → c
7. OrthogonalLine(A, c) → d
8. Intersect(c, d) → D
9. Segment(A, D) → h
10. Segment(B, D) → p
11. Segment(C, D) → q
12. Angle(B, A, C) → α
13. Angle(C, D, A) → β
14. Angle(A, D, B) → γ
15. Angle(D, B, A) → δ
16. Angle(B, A, D) → ε
17. Angle(D, A, C) → ζ
18. Angle(A, C, D) → η