使用圆规构造角平分线

GeoGebra 命令及参数

1. Circle(O, Distance[O, B]) → s
2. Rotate(B, 170°, O) → B'
3. Circle(O, B) → c
4. Arc(c, B, B') → d
5. Point(d) → A
6. Midpoint(O, A) → G
7. AngularBisector(B, O, A) → j
8. Intersect(s, j, 2) → F
9. Segment(O, B) → f
10. Segment(O, A) → g
11. Circle(O, R_1) → e
12. If(0 ≤ a < 1, a, 1) → m_1
13. Angle(B, O, A) → α
14. Intersect(e, g, 1) → C
15. Intersect(e, f, 1) → D
16. Rotate(C, 15°, O) → C'
17. If(1 ≤ a < 2, a - 1, If[a < 1, 0, 1]) → m_2
18. If(2 ≤ a < 3, a - 2, If[a < 2, 0, 1]) → m_3
19. Rotate(C', (((-m_1) * (α / ° + 30)))°, O) → D'
20. Arc(e, D', C') → h
21. Distance(G, F) → R_2
22. Circle(C, R_2) → k
23. Circle(D, R_2) → p
24. Intersect(k, p, 1) → E
25. Rotate(E, 15°, C) → E'
26. Rotate(E', (((-m_2) * 30))°, C) → E_1
27. Arc(k, E_1, E') → q
28. Rotate(E, 15°, D) → E''
29. Rotate(E'', (((-m_3) * 30))°, D) → E_2
30. Arc(p, E_2, E'') → r
31. Vector(O, E) → u
32. If(3 ≤ a ≤ 4, a - 3, 0) → m_4
33. Translate(O, Vector[(m_4 * u)]) → O'
34. Segment(O, O') → i
35. Angle(D', O, C') → β
36. SelectedIndex(Bahasa) → n
37. If(n ≟ 1, "Animate", "Animasi") → Tex1
38. If(n ≟ 1, "Resume", "Teruskan") → Tex3
39. If(n ≟ 1, "Reset", "Semula") → Tex8
40. If(n ≟ 1, "Stop", "Berhenti") → Tex2
41. If(n ≟ 1, "To construct the angle bisector of ∠AOB using a pair of compasses", "Membina pembahagi dua sama ∠AOB dengan menggunakan jangka lukis") → Tex4
42. If(n ≟ 1, "Center O radius less than OA", "Pusat O jejari kurang daripada OA") → Tex5
43. If(n ≟ 1, "Center C suitable radius R", "Pusat C jejari yang sesuai R") → Tex6
44. If(n ≟ 1, "Center D radius R", "Pusat D jejari R") → Tex7