凸五边形的外角和

GeoGebra 命令及参数

1. Line(A, B) → a
2. Line(B, C) → b
3. Line(C, D) → c
4. Line(D, E) → d
5. Line(E, A) → e
6. Point(a) → F
7. Point(e) → G
8. Point(b) → H
9. Point(a) → I
10. Point(c) → J
11. Point(d) → K
12. Point(b) → L
13. Point(e) → M
14. Point(c) → N
15. Point(d) → O
16. Polygon(A, B, C, D, E) → poly1, a_1, b_1, c_1, d_1, e_1
17. Angle(H, B, A) → α
18. Angle(F, A, E) → β
19. Angle(M, E, D) → γ
20. Angle(K, D, C) → δ
21. Angle(J, C, B) → ε
22. Sum({α, β, γ, δ, ε}) → ExteriorSum