五边形面积计算，边长7

GeoGebra 命令及参数

1. Polygon(A, B, 5) → poly1, a_1, b, c, d, e, C, D, E
2. LineBisector(d) → g
3. LineBisector(c) → h
4. Intersect(g, h) → F
5. Polygon(A, F, B) → poly2, b_1, a_2, f_1
6. Segment(F, E) → i
7. Segment(F, D) → j
8. Segment(F, C) → k
9. Angle(A, F, B) → α
10. Segment(A, G) → l
11. Vector(A, H) → u
12. Translate(A, u) → A'
13. Translate(F, u) → F'
14. Translate(B, u) → B'
15. Polygon(A', F', B') → poly2', b', a', f'
16. OrthogonalLine(F', l) → m
17. Intersect(f, m, 1) → I
18. Segment(I, F') → n
19. Angle(H, F', I) → β
20. Angle(F', I, H) → γ
21. PointIn(poly2') → Pointpoly2'
22. PointIn(poly1) → Pointpoly1