Unit line segments of the triangular lattice joined end to end; six segments meet at every vertex.
The 12 free tritrigs.
| Figure | Order | Free | One-sided | Fixed | Verified |
|---|---|---|---|---|---|
| monotrig | 1 | 1 | 1 | 3 | ✓ 14/14 |
| ditrig | 2 | 3 | 3 | 15 | ✓ 14/14 |
| tritrig | 3 | 12 | 19 | 91 | ✓ 14/14 |
| tetratrig | 4 | 60 | 104 | 603 | ✓ 14/14 |
| pentatrig | 5 | 375 | 719 | 4,215 | ✓ 14/14 |
| hexatrig | 6 | 2,613 | 5,123 | 30,535 | ✓ 14/14 |