三角形内角和计算

GeoGebra 命令及参数

1. Point(Circle[D, 2]) → G
2. Point(Circle[E, 2]) → H
3. Point(Circle[F, 2]) → I
4. Corner(1) → C1
5. Corner(3) → C3
6. Rotate(G, angA, D) → G'
7. Rotate(H, angB, E) → H'
8. Rotate(I, angC, F) → I'
9. Point(Ray[D, G]) → A
10. Point(Ray[D, G']) → B
11. Point(Ray[E, H']) → C
12. Point(Ray[E, H]) → J
13. Point(Ray[F, I]) → K
14. Point(Ray[F, I']) → L
15. PolyLine(A, D, B) → f
16. PolyLine(J, E, C) → g
17. PolyLine(K, F, L) → h
18. Angle(A, D, B) → α
19. Angle(J, E, C) → β
20. Angle(K, F, L) → γ