圆的组成部分：半径、直径、弦与扇形/圆弧识别

GeoGebra 命令及参数

1. Circle(O, B_1) → given
2. Point(given) → A
3. Line(A, O) → a_1
4. Intersect(given, a_1, 2) → D
5. Point(given) → B
6. Segment(O, A) → radiA
7. Segment(A, D) → diam
8. Segment(A, B) → chord
9. CircleArc(O, A, B) → arcoAB
10. CircleArc(O, B, A) → arcoBA
11. CircleSector(O, A, B) → sect1
12. CircleArc(O, A, B) → segm1
13. CircleArc(O, B, A) → segm2
14. Radius(given) → givenRad
15. PointIn(feasibleAn) → A'
16. Circle(O, A') → ann
17. Semicircle(D, A) → semic
18. Segment(D, A) → diamTratt
19. CircleSector(O, A, D) → halfDisc
20. CircleSector(O, B, A) → sect2
21. SelectedIndex(ddMenuEn) → is
22. SelectedIndex(ddMenuIt) → isIt
23. Circle(O, A') → inner
24. Radius(inner) → innerRad
25. Segment(O, B) → radiB
26. Angle(A, O, B) → ang1
27. Angle(B, O, A) → ang2
28. Segment(O, A) → radTratt1
29. Segment(O, B) → radTratt2
30. Point(given) → I
31. Segment(B, I) → inscr2
32. Segment(I, A) → inscr1
33. Angle(B, I, A) → inscrAng
34. If(arg(A) > 0°, arg(A), arg(A) + 360°) → ppA
35. If(arg(B) > 0°, arg(B), arg(B) + 360°) → ppB
36. If(arg(I) > 0°, arg(I), arg(I) + 360°) → ppI
37. AngularBisector(B, I, A) → bisettr
38. Intersect(Arc[given, A, B], bisettr) → IN,
39. Segment(A, B) → segmAB
40. Tangent(A, given) → tgA,
41. Segment(A1, A2) → segmTg
42. Angle(B, A, A1) → tempAng
43. If(tempAng ≠ inscrAng, Angle[B, A, A2], Angle[B, A, A1]) → angCirc2