测量二维图形面积 by GeoGebra Institute of Hong Kong (5)

GeoGebra 命令及参数

1. Intersect(xAxis, yAxis) → A
2. Point(xAxis) → C
3. Point(xAxis) → F
4. Rotate(A, (-180° * t1), D) → A'
5. Rotate(D, (-180° * t2), D) → D'
6. Rotate(F, (-180° * t1), D) → F'
7. Polygon(A', D', F') → poly1, f', a', d'
8. Rotate(D, (180° * t1), D) → D'_1
9. Rotate(E, (180° * t2), D) → E'
10. Rotate(B, (180° * t2), D) → B'
11. Polygon(B', D'_1, E') → poly2, e', b', d'_1
12. Polygon(C, E, D, F) → poly3, c, e, d, f
13. Polygon(A', D', F') → poly1', f'_1, a'_1, d'_2
14. Polygon(B', D'_1, E') → poly2', e'_1, b'_1, d'_3
15. Polygon(A, B, C) → poly4, c_1, a, b
16. Polygon(A, F, D, E, B) → poly5, a_1, f_1, d_1, e_1, b_1
17. Segment(X0, X0 + (0, 0.25)) → g
18. Segment(X0, X0 + (0, mark)) → h
19. Segment(X0 + (1, 0), X0 + (1, mark)) → i
20. Vector(X0 + (0, mark / 2), X0 + (1, mark / 2)) → u
21. Vector(X0 + (1, mark / 2), X0 + (0, mark / 2)) → v
22. Segment(Y0 - (mark, 0), Y0) → j
23. Segment(Y0 - (mark, 1), Y0 - (0, 1)) → k
24. Vector(Y0 - (mark / 2, 1), Y0 - (mark / 2, 0)) → w
25. Vector(Y0 - (mark / 2, 0), Y0 - (mark / 2, 1)) → z
26. Segment((3, -1), (3, 3)) → l