弧度与角度互换

GeoGebra 命令及参数

1. Circle(O, r1) → c1
2. Circle(O, r2) → c2
3. Sequence(Segment[(r1; k°), (r2; k°)], k, 0, 355, 5) → ticks
4. Circle(O, r3) → c3
5. Point(Sequence[(r1; k°), k, 0, 365]) → P
6. Sequence(Segment[(r3; k), (r3 + dr3; k)], k, 0, 6) → ticksRadian
7. Sequence(Text[k, (r3 + dr3 + 0.2; k) + Off1], k, 0, 6) → ticksRadianLabels
8. Segment(O, P) → a
9. Circle(O, r22) → c22
10. Sequence(Segment[(r22; k°), (r2; k°)], k, 0, 315, 45) → ticks45
11. Sequence(Segment[(r22; k°), (r1; k°)], k, 0, 345, 15) → ticks15
12. CircleArc(O, (r3, 0), P) → d