Geometric Construction

9 Divide a Circle Into 12 Equal Parts

  1. Draw an x-y axis.
  2. Draw a circle.
  3. From each point, swing the in both directions to cross the . (Remember, when we swing the along an of equal distance, we create 60°.) As we do it both ways, we end up with 30°-60°-90° all the way around the circumference.
This is one of the most common techniques we use. Know it well!!!

License

Icon for the Creative Commons Attribution 4.0 International License

Pattern Development: Sheet Metal Level 1 by Brian Coey is licensed under a Creative Commons Attribution 4.0 International License, except where otherwise noted.

Share This Book