通过分割重组计算平行四边形面积

GeoGebra 命令及参数

1. Intersect(xAxis, yAxis) → A
2. Line(C, xAxis) → a
3. Segment(C, B) → b
4. Line(A, b) → c
5. Intersect(a, c) → D
6. OrthogonalLine(D, a) → d
7. OrthogonalLine(B, a) → e
8. Intersect(a, e) → F
9. Point(d) → E
10. Polygon(D, A, E) → poly1, e_1, d_1, a_1
11. Translate(D, u) → D'
12. Translate(A, u) → A'
13. Translate(E, u) → E'
14. Polygon(D', A', E') → poly1', e', d', a'
15. Segment(D, C) → h
16. Segment(A, B) → i
17. Segment(D, E) → j
18. Segment(E, B) → k
19. Polygon(D, C, B, A) → poly2, d_2, c_1, b_1, a_2
20. Polygon(D, E, E', C) → poly3, d_3, e_2, e'_1, c_2
21. Polygon(D, A, B, C) → poly4, d_4, a_3, b_2, c_3