Scott Kim calls
anything that can be read in
more than one way an "inversion."
He used such writing in developing new
font systems for computers.
Graphic artist John Langdon of Philadelphia,
has developed writing similar to Kim's that he calls "ambigrams."
Artist M. C.
Escher used many types of symmetries in designing his
A circle and a sphere have the most symmetries
of any geometric objects.
A figure with both horizontal and vertical
lines of symmetry also has 180° rotational symmetry,
but not the other way around.