Geometric Modeling - Open published by Andrew Frank on January 10, 2020 (CC BY 4.0)

Note that the model above only works at certain scales - not based on precise mathematical relationships.

All models shown were made by Andrew Frank. This work by is being released under the Creative Commons 4.0 International License.

Link to my Geometric Universe site:

https://sites.google.com/site/geometricuniverse/