# Convex Figures with Tridrafter Pairs

A tridrafter is a polyform made by joining three drafters, 30°-60°-90° right triangles, at their short legs, long legs, hypotenuses, or half hypotenuses.

A polydrafter is proper if its cells conform to the polyiamond (triangle) grid, and extended if some do not.

Below I show how to make a minimal convex figure using copies of two tridrafters, at least one of each. These solutions are not necessarily unique, nor are their tilings. If you find a solution with fewer tiles, or solve an unsolved case, please write.

• 2 Tiles
• 3 Tiles
• 4 Tiles
• 5 Tiles
• 6 Tiles
• 7 Tiles
• 8 Tiles
• 9 Tiles
• 10 Tiles
• 11 Tiles
• 12 Tiles
• 14 Tiles
• 16 Tiles
• 17 Tiles
• 18 Tiles
• 20 Tiles
• 22 Tiles
• 23 Tiles
• 24 Tiles
• 26 Tiles
• 29 Tiles
• 36 Tiles
• 38 Tiles
• 40 Tiles
• 42 Tiles
• 48 Tiles
• 52 Tiles
• Lost Sheep

## Lost Sheep

No convex pairing is known for any of these five tridrafters:

Each can form a convex shape with copies of two other tridrafters:

Last revised 2020-09-08.

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Col. George Sicherman [ HOME | MAIL ]