Didrafters at Scales 1 and 5

A didrafter is made by joining two 30°-60°-90° triangles along equal edges, where the halves of a triangle's hypotenuse may be used separately. A didrafter is proper if it can be placed on a polyiamond grid so all its edges lie on the edges and medians of the grid cells. Otherwise it is improper or extended.

There are 13 didrafters, 6 proper and 7 extended. They have 26 cells in all. Here I show how to tile each of 5 didrafters at scales 1 and 5, using a double set of didrafters. The solutions are not unique.

Last revised 2021-02-20.

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George Sicherman [ HOME | MAIL ]