A pair of tetrahedra from the zome tetrahedra challenge.
Two distinct tetrahedra can be constructed from the same set of zome struts. While they both use 2 B1, 3 B2 and 2 R1 struts, the three B2s form an equalateral triangle in one case but not in the other. This model shows both of them side by side sharing a vertex at the origin.
These two tetrahedra correspond to numbers 52 and 53 of the chart on page 5 of the zometool manual
