Convex Shapes from the 13 Didoms
A didom is a polyform
made by joining two doms,
2×1 right triangles,
at their short legs, long legs, half long legs, or hypotenuses.
All but one of the didoms conform to the polyomino (square) grid.
Here are the 13 didoms:
Below I show how to arrange the 13 didoms to make convex shapes.
The left shape has 6 tilings.
The right shape has 5.
I believe that these are the only convex shapes
that can be formed by the 13 didoms.
Can anyone confirm this?
Last revised 2020-06-22.
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Col. George Sicherman