Pentabolo Odd Pairs


A pentabolo or pentatan is a plane figure formed by joining five equal isosceles right triangles edge to equal edge. There are 30 different pentaboloes, not counting reflections and rotations.

An odd pair is a figure that can be tiled by an odd number of each of two polyforms. Here I show minimal known pentabolo odd pairs. If you find a smaller solution or solve an unsolved case, please write.

3 Tiles

5 Tiles

7 Tiles

9 Tiles

11 Tiles

13 Tiles

15 Tiles

17 Tiles

19 Tiles

25 Tiles

Last revised 2014-02-20.

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Col. George Sicherman [ HOME | MAIL ]