Draw four equal parts of any four rays with an included angle of 90 degrees from the center of the square.

Starting from the center of the square, drawing an arc or other curve can also divide the square into four equal parts.

There are also three parallel lines with equal sides, which divide the square into four identical rectangles.

Divide a rectangle into four equal parts-there are only three ways to divide it.

Because the diagonal intersection of the rectangle can't be completely divided into four equal parts, but the area is equal and the shape is different.