The drawing illustrates the symmetry of a pattern of type *2222, by putting in evidence th...
The drawing illustrates the symmetry of a pattern of type 22×, by putting in evidence the...
The drawing illustrates the symmetry of a pattern of type 22*, by putting in evidence the ...
The drawing illustrates the symmetry of a pattern of type o, by putting in evidence the pa...
The drawing illustrates the symmetry of a pattern of type *×, by putting in evidence the ...
The drawing illustrates the symmetry of a pattern of type ××, by putting in evidence th...
The drawing illustrates the symmetry of a pattern of type 22×, by putting in evidence the...
the schemes for the 17 wallpaper patterns