ABSTRACT

Note that the triangles have diff erent orientations on the cube. Th e numbers in parentheses show the total numbers of copies of each particular triangle.

Th e family sitting around the table is the Year, and its four members are the four Seasons. Each Season’s three-letter name is actually the fi rst letters of the three months of that Season as follows:

• Spring: (M)arch, (A)pril, (M)ay; • Summer: (J)une, (J)uly, (A)ugust; • Fall: (S)eptember, (O)ctober, (N)ovember; • Winter: (D)ecember, (J)anuary, (F)ebruary. Th e months are arranged counterclockwise starting from Decem-

ber in the lower-right corner.