A hexiamond is a plane figure formed by joining 6 equal equilateral triangles edge to edge. There are 12 hexiamonds:
Here I show the smallest known pentagonal (five-sided) polyiamonds that can be formed by copies of a pentiamond and a hexiamond, using at least one of each. If you find a smaller solution, please write.
See also
| 6A | 6E | 6F | 6H | 6I | 6L | 6O | 6P | 6S | 6U | 6V | 6X | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 5I | 17 | 87 | 17 | 47 | 11 | 11 | 47 | 11 | 63 | 26 | 17 | 16 |
| 5J | 44 | 31 | 26 | 26 | 31 | 47 | 107 | 11 | 107 | 11 | 11 | 31 |
| 5Q | 16 | ? | 17 | ? | 11 | 28 | 11 | 16 | ? | 11 | 17 | ? |
| 5U | 11 | ? | 11 | ? | ? | ? | ? | 17 | ? | ? | 135 | ? |
Last revised 2025-03-04.