四边形面积计算 by sudheer kumar kotha

GeoGebra 命令及参数

1. Segment(A, C) → a
2. Segment(A, B) → d
3. Segment(B, C) → e
4. Point(a) → O
5. Line(B, O) → b
6. Point(b) → E
7. Ray(O, E) → c
8. Point(c) → D
9. Segment(C, D) → f
10. Segment(D, A) → g
11. Segment(B, D) → h
12. Angle(D, O, A) → δ
13. Angle(D, O, C) → ω
14. Angle(B, O, A) → α
15. Angle(C, O, B) → β
16. Polygon(A, B, C, D) → poly1, a_1, b_1, c_1, d_1
17. Segment(B, D) → j
18. Segment(A, C) → k
19. Angle(C, O, D) → γ
20. Polygon(B, O, C) → poly2, c_2, b_2, o
21. Polygon(B, O, A) → poly3, a_2, b_3, o_1
22. Polygon(A, D, O) → poly4, o_2, a_3, d_2
23. Polygon(C, O, D) → poly5, d_3, c_3, o_3