Shape

87 What Makes Calculating Visual?
to find these triangles in exactly the same way. Medium triangles—if I resolve all of
them—define nine constituents
and small triangles—again, if I resolve all of them—define sixteen
The atoms I get for the small triangles—the half lines in Evans’s example—are
the most refined constituents I can define, regardless of how I use the identity to pick
out triangles. All of the large triangles in the shape are made up of six constituents
apiece, all of the medium triangles contain four constituents each, and all of the small
triangles have three