同位角与同旁内角关系演示

GeoGebra 命令及参数

1. Line(A, B_1) → a
2. Point(a) → C
3. Line(G, a) → b
4. Line(C, G) → c
5. Circle(G, 3) → d
6. Circle(C, 3) → e
7. Intersect(e, a, 2) → B
8. Intersect(e, c, 1) → D
9. Intersect(d, b, 1) → E
10. Intersect(d, b, 2) → F
11. Intersect(d, c, 2) → H
12. Angle(D, C, B) → α
13. Angle(G, C, A) → β
14. Angle(C, G, F) → γ
15. Angle(H, G, E) → δ
16. Angle(F, G, H) → ε
17. Angle(E, G, C) → ζ
18. Angle(B, C, G) → η
19. Angle(A, C, D) → θ