Select the eight shapes and Ctrl+1 (Add Shapes):
Printable View
Select the eight shapes and Ctrl+1 (Add Shapes):
Select the outer circle (NOT the centring circle) Bring to front (Ctrl+F) then shift select the newly created shape. Ctrl+3 (Intersect Shapes):
Select the next outer circle (NOT the centring circle) Bring to front (Ctrl+F) then shift select the newly created shape. Ctrl+1 (Add Shapes):
Finally select the next inner circle. Bring to front (Ctrl+F) then shift select the newly created shape. Ctrl+2 (Subtract Shapes):
However as I said earlier all these Combine / Arrange shapes can lead to unwanted nodes, one above another, so it's a matter of selecting the Shape Tool and Tab or Shift Tab deleting nodes (just the straight line ones, not any curved ones). Unfortunately even the Smoothing tool doesn't remove these duplicated nodes:
egg: That's similar to my method. Except that I used one shape that goes from top to bottom.
Then cloned it and rotated it 45 degrees.
Yes very similar Rick and probably easier to rotate than my method of using a Centring Circle. Still find the additional nodes created by Combine Shapes / Etc annoying.
Personally I would use ProCAD+ on RISC OS for something like that. (Screenshot from the Windows version but, has some problems with newer versions of Windows.) Works nicely with Artworks.
Attachment 124847
Very easy and just need to draw circle and single tooth for the gear. Set reference point for the tooth to middle of the circle and use multiple copy, quantity 8 and object centre, click OK and the result will be perfect.
Only need to draw single tooth and half of the gap to both sides, and the cog shape comes automatically. No need shaping and very easy to do with reference image or with some helper lines.
Attachment 124851
Without reference image.