How did the Z-shape become axisymmetric?
Rotate 180 degrees according to the geometric center position. Rotate the word "Z" by 180 degrees according to the geometric center position to become the word "W", thus becoming an axisymmetric figure. Axisymmetric graphics, in mathematical terms, are defined as graphics folded along a straight line in a plane, and the parts on both sides of the straight line can completely overlap.