已知圆心角求弧长

GeoGebra 命令及参数

1. Element(Dimension[Arc1Arc2Radius], 1) → NumberOfEquations
2. Random(1, NumberOfEquations) → CircleCounter
3. Element(Arc1Arc2Radius, CircleCounter) → targetCircleCoef
4. Textfield(h) → inputBox1
5. Textfield(k) → inputBox2
6. Textfield(r) → inputBox3
7. Random(1, 4) → WhichPoint
8. Element(targetCircleCoef, 1) → Arc1
9. Element(targetCircleCoef, 2) → Arc2
10. Element(targetCircleCoef, 3) → radius
11. Circle(YourCenter, radius) → c
12. Mod(CircleCounter + 1, NumberOfEquations + 1) → counter
13. Point(c) → A
14. Random(1, (360 - Arc1 - Arc2) / 2) → MissingArcBetween1and2
15. Rotate(A, α°, YourCenter) → C
16. Angle(A, YourCenter, C) → AngleArc1
17. ArcDeg(c, A, C) → d, text1
18. Rotate(C, MissingArcBetween1and2°, YourCenter) → D
19. Angle(C, YourCenter, D) → AngleArcCD
20. Rotate(D, Arc2°, YourCenter) → F
21. Angle(D, YourCenter, F) → AngleArc2
22. ArcDeg(c, D, F) → e, text3
23. Segment(YourCenter, A) → a
24. Segment(YourCenter, C) → b
25. Rotate(A, (Arc1 / 2)°, YourCenter) → B
26. Angle(A, YourCenter, B) → ε
27. Rotate(D, (Arc2 / 2)°, YourCenter) → E
28. Angle(D, YourCenter, E) → ζ
29. Circumference(c) → CircCircumf
30. Area(c) → CircArea
31. Textfield(YourArea) → YouArea
32. Textfield(YourCircumference) → YouCircumference
33. Textfield(YourSectorAOC) → YouSectorAOC
34. Textfield(YourArcACLength) → YouArcAClength
35. Textfield(YourAngleAOC) → YouAngleAOC
36. Textfield(YourAngleFOD) → YouAngleFOD
37. Textfield(YourArcACdegree) → YourArcAC
38. Textfield(YourArcFDdegree) → YourArcFD
39. Textfield(YourRadius) → YouRadius
40. Textfield(YourDiameter) → YouDiameter
41. CircumcircleSector(A, B, C) → f