Hexiamond Pair Pentagons

A hexiamond is a plane figure formed by joining six equal equilateral triangles edge to edge.

Here I show the smallest known pentagonal (five-sided) polyiamonds that can be formed by copies of two hexiamonds, using at least one of each. If you find a smaller solution, please write.

In pentagonal polyiamonds, the numbers of cells pointing up and pointing down are never equal. So at least one of the hexiamonds used must have unequal numbers of cells pointing up and down. The only such hexiamonds are F and P.

See also Heptiamond Pair Pentagons.

2 Tiles

3 Tiles

4 Tiles

5 Tiles

6 Tiles

8 Tiles

9 Tiles

11 Tiles

14 Tiles

23 Tiles

24 Tiles

38 Tiles

Last revised 2024-07-30.

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Col. George Sicherman [ HOME | MAIL ]