- Radius, diameter, circumference
- Pi, the same for every circle
- Circumference from the diameter
- Circumference from the radius
- Backward, and wheels
- Where πr² comes from
- Area from the diameter
- Estimating and doubling the radius
- Half and quarter circles
- A circle taken out of a shape
- Mixed figures and choosing the measure
- Unlocks after
- Opens up
- The end of this path.