How Many Lines Of Symmetry Does A Rectangle Have
There are many folding balances in W, does it recover?
Double equilibrium (vertical and horizontal lines run in the middle of the center), except that the sphere is a square, in which case there is four times equilibrium (two diseases except the line connecting the opposite corners).
Balance line recycling
This page can help you.
Are there many balance balances in one rack?
Alien, balance 2 times
2 axes of balance
(Actually, there are many diagonal lines that cut a layer into two equal parts, but only the vertical and horizontal lines that pass through the middle produce a mirror effect.)