The other shapes are geometric guides that are made to fit inside the innermost circle. These could be used to aid in measuring/designing parts of magical circles, etc.
Hopefully someone out there can find use for these.
Example Below:
Couldn't figure out how to fix and replace existing materials in the original release so had to delete/re-upload. Hopefully I got these actually correct this time, so I won't have to do this again.
Sorry.
Circles
3-Sided
4-Sided
5-Sided
6-Sided
7-Sided
8-Sided
9-Sided