三角形外角定理演示

GeoGebra 命令及参数

1. Line(A, B) → f
2. Slope(f) → a
3. PointIn(c) → C
4. Segment(A, C) → g
5. Segment(C, B) → h
6. Segment(B, A) → i
7. Min(list1) → d
8. Circle(A, (0.2 * d)) → e
9. Circle(B, (0.2 * d)) → k
10. Circle(C, (0.2 * d)) → p
11. Ray(A, B) → j
12. Ray(B, C) → l
13. Ray(C, A) → m
14. Point(j) → D
15. Point(l) → E
16. Point(m) → F
17. Ray(B, D) → n
18. Ray(C, E) → q
19. Ray(A, F) → r
20. Intersect(p, g, 1) → G
21. Intersect(p, h, 1) → H
22. Intersect(e, i, 1) → I
23. Intersect(e, g, 1) → J
24. CircleSector(A, I, J) → s
25. CircleSector(C, G, H) → t
26. Polygon(A, B, C) → poly1, c_1, a_1, b_1
27. Dilate(A, If[0 < o ≤ 1, 1 - o, 0], B) → A'
28. Vector(A, A') → u
29. Translate(s, u) → s'
30. CircleArc(A, I, J) → d_1
31. Distance(A, I) → v
32. Rotate(t, If[1 < o ≤ 2, ((o - 1) * π), π], C) → t'
33. CircleArc(C, G, H) → e_1
34. Angle(G, C, H) → α
35. Dilate(C, If[2 < o ≤ 3, 3 - o, 0], B) → C'
36. Vector(C, C') → u_1
37. Translate(t', u_1) → t''
38. Intersect(k, n) → K,
39. Intersect(k, h) → L,
40. CircleArc(B, K, L) → f_1