正方形与菱形的面积计算

GeoGebra 命令及参数

1. Circle(B, r) → c
2. Segment(A, B) → a
3. Point(c) → C_1
4. Point(c) → D_1
5. CircleArc(B, C_1, D_1) → d
6. Point(d) → C
7. Line(C, a) → b
8. Segment(B, C) → e
9. Line(A, e) → f
10. Intersect(b, f) → D
11. Segment(D, C) → g
12. Segment(D, A) → h
13. OrthogonalLine(D, a) → i
14. Intersect(i, a) → P
15. Segment(P, D) → v
16. Polygon(A, B, C', D') → poly1, a_1, b_1, e_1, f_1
17. Intersect(g, b_1) → E
18. Polygon(B, C, E) → poly2, e_2, b_2, c_1
19. Line(F, a) → j
20. Vector(C, D) → w
21. Segment(F, G) → k
22. Point(k) → H
23. Vector(F, H) → z
24. Translate(B, z) → U
25. Translate(C, z) → V
26. Translate(E, z) → W
27. Polygon(U, V, W) → poly2', e', b', c'_1
28. Polygon(A, B, E, D) → poly3, a_2, b_3, e_3, d_1
29. Polygon(A, B, C, D) → poly4, a_3, b_4, c_2, d_2