Working through this now and thus far have:

https://wiki.shapeoko.com/index.php/Design_into_3D#Toolpaths

- 0
- circle
- oval/ellipse (requires some sort of non-arc curve)
- egg-shaped (requires some sort of non-arc curve)

- annulus (one circle within another forming a ring)
- superellipse (see astroid below)

- 1
- cone with rounded end (arc)

- 2
- semicircle/circular segment (arc and a straight line)
- lens/vesical piscis (two convex curves)
- lune/crescent (one convex one concave curve)
- heart (two curves)
- tomoe (comma shape) â€” requires non arc curves

- 3
- triangle
- equilateral
- isosceles
- scalene
- sector (two straight edges, one convex arc)

- two straight edges, one concave arc
- Deltoid curve (three concave arcs)
- Reuleaux triangle (three convex arcs)
- Arbelos (one convex, two concave arcs)

- triangle
- 4
- square
- rectangle
- parallelogram
- rhombus
- trapezoid/trapezium
- kite
- astroid (four concave arcs)
- salinon (four semicircles)

any obvious corrections or additions?

Other suggestions?