When Xiaoli was in shear center, she could find it by folding the paper in half and cutting it open. Why?

The heart shape is a symmetrical figure, which can be obtained by folding it in half.

A heart is folded in half from the middle, that is, a line between the apex and the heart socket is folded in half. You can see that both sides are symmetrical. If you want to cut this shape, just fold the paper in half and cut one side.

There are also symmetrical figures such as squares, rectangles and circles. , folded in half and then cut to get it.