Introduction: Quickly Divide a Circle Perfectly

By www.youtube.com/user/TabLeft

A quick super accurate way to divide the circumference of a circle.

Just find the number of points you want to divide the circle into in the list below and multiple the radius by the value (e.g. 5 slices of a 4" diameter circle would be 2 * 1.1756) then set your calipers/compass

  1. n/a
  2. n/a
  3. 1.7321
  4. 1.4142
  5. 1.1756
  6. 1.0000
  7. 0.8678
  8. 0.7654
  9. 0.6840
  10. 0.6180
  11. 0.5635
  12. 0.5176
  13. 0.4786
  14. 0.4450
  15. 0.4158
  16. 0.3902
  17. 0.3675
  18. 0.3473
  19. 0.3292
  20. 0.3129

The multipliers above were calculated with the following formula

DEG = 360/n where "n" is how many points around the circle you want

sin(DEG/2)*2 = your multiplier

Here is a link to Jack Houweling's page: https://www.youtube.com/user/Jacka440 I highly recommend you check it out.