how can u determine whether a design has a reflectional symmetry??

Answer 1

If it is reflection about y axis
then y = y
and x = -x
if it is about x, then x = x and y = -y
if it is about the line x = y then
x = y and y = x (interchange)

Answer 2

HOW CAN YOU DETERMINE WHETHER A DESIGH HAS REFLECTIONAL SYMMETRY?