等分圆弦长计算表

均分角度份数弦长L=R×系数R为半径72°5R×1.17557

60°6R×1

51.43°7R×0.86777

45°8R×0.765367

40°9R×0.684

36°10R×0.618

32.73°11R×0.563465

30°12R×0.517638

27.69°13R×0.478631

25.71°14R×0.445042

24°15R×0.415823

22.5°16R×0.390181

21.18°17R×0.367499

20°18R×0.347296

18.95°19R×0.329189

18°20R×0.312869

17.14°21R×0.298085

16.36°22R×0.2846297

15.65°23R×0.272333

15°24R×0.2610524

14.4°25R×0.250666

13.85°26R×0.241073

13.33°27R×0.232186

12.86°28R×0.223929

12.41°29R×0.216238

12°30R×0.209057