ERN Item Type:
- Classroom Activities
Basic geometric forms such as cubes, octahedra, rhombohedra, and tetrahedra may be made by folding flat paper or envelopes, both reasonably priced starting materials. These may be used to help visualize solid forms in crystallography and mineralogy and numbers of them may be used to create unit cells. Tetrahedra in particular are easy to make by folding and cutting small envelopes. Tetrahedra may be linked to build silicate and carbonate crystal models. To make your own hexaflexagon with earthquake-education themes, follow these guides!