梯形构造演示 by rlrobinso945

GeoGebra 命令及参数

1. Segment(A, B) → f
2. Line(C, f) → g
3. Point(g) → D
4. Segment(D, B) → h
5. Segment(C, A) → i
6. Segment(C, D) → j
7. Angle(C, D, B) → α
8. Angle(D, B, A) → β
9. Angle(B, A, C) → γ
10. Angle(A, C, D) → δ
11. Distance(C, D) → distanceCD
12. Distance(D, B) → distanceDB
13. Distance(B, A) → distanceBA
14. Distance(A, C) → distanceAC
15. Polygon(D, C, A, B) → q1, d, c, a, b
16. Distance(C, B) → distanceCB
17. Distance(D, A) → distanceDA
18. Segment(C, B) → k
19. Segment(D, A) → l