How many lines of symmetry are in the square? Which are they?
There are four lines of symmetry in a square. In these four lines of symmetry, the two lines of symmetry are the two diagonals of a square, as both the diagonals divide a square into two identical parts, which are mirror images of each other. The other two lines of symmetry are the bisectors, or we can also say one horizontal line and one vertical line, which pass through the middle of the square.