average spatial: 1.5 cm x 9 cm x 8 cm; 19/32 in x 3 17/32 in x 3 5/32 in
United States: Massachusetts, Worcester
ca 1931 -1933
The three pieces of this hinged dissection can be arranged to form an equilateral triangle or a into a hexagon with a hole in the shape of an equilateral triangle.
With a second model of an equilateral triangle, this is Wheeler's model 4HI, a hexagon transformable into two equilateral triangles or a rhombus. This is in Wheeler's list of dissections, 1979.3002.43, folder 2. There is a drawing in 1979.3002.55 (folder 1), but the name is not designated on the drawing. There is a second drawing with the name designated in the same folder, dated April 21, 1931.