平行四边形的面积 by Catherine Eagen

GeoGebra 命令及参数

1. Segment(B, A) → a
2. Line(C, a) → b
3. Segment(A, C) → c
4. Line(B, c) → d
5. Intersect(b, d) → D
6. Segment(C, D) → e
7. Segment(D, B) → f
8. OrthogonalLine(C, a) → g
9. Vector(C, D) → u
10. Distance(A, C) → distanceAC
11. Distance(A, B) → distanceAB
12. Polygon(A, B, D, C) → poly3, a_2, b_1, d_2, c_3
13. LaTeX(poly3, true, true) → text1
14. OrthogonalLine(C, f) → m
15. Segment(A, B) → q
16. Segment(B, D) → t
17. LaTeX(distanceAB, true, true) → text6
18. LaTeX(distanceAC, true, true) → text7
19. Line(A, B) → h
20. Line(D, B) → n
21. OrthogonalLine(C, h) → a_1
22. OrthogonalLine(C, n) → c_1
23. Intersect(a_1, h) → E
24. Intersect(c_1, n) → F
25. Segment(C, E) → d_1
26. Segment(C, F) → e_1
27. Segment(A, E) → f_1
28. Segment(D, F) → g_1
29. Angle(C, E, A) → α
30. Angle(D, F, C) → β