Below I show how to arrange the 13 didrafters to make convex shapes. The number below each shape tells how many tilings it has.

According to this page by Ed Pegg Jr., Wei-Hwa Huang was the first to arrange the 13 didrafters to form a convex shape. Wei-Hwa, Ed, and I do not know which of these shapes it was.

Last revised 2020-08-28.

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Col. George Sicherman [ HOME | MAIL ]