what is symmetry

Symmetry is a property of an object that allows us to divide it into two identical halves, which are mirror images of each other. It is a proportionate and balanced similarity found in two halves of an object, which means one-half is the mirror image of the other half. In mathematics, a shape or an object has symmetry if it can be divided into two identical pieces. The imaginary line or axis along which you can fold a figure to obtain the symmetrical halves is called the line of symmetry. Symmetry can be observed in everyday life, in science and nature, and in the arts, covering architecture, art, and music. Symmetry can be observed with respect to the passage of time, as a spatial relationship, through geometric transformations, through other kinds of functional transformations, and as an aspect of abstract objects, including theoretic models, language, and music. Symmetry is also used in biology to describe the properties of the objects studied, including their interactions. The opposite of symmetry is asymmetry, which refers to the absence of symmetry.