The term symmetry means uniformity. In mathematics, Symmetry means balance. Shapes that have evenly balanced proportions are known as symmetrical shapes. A shape is said to be symmetrical when its two halves are mirror images along the line of Symmetry. That is, they are dividing the picture exactly into 2 equal parts. Those 2 parts are equal in size and similar to another part. The line about which the figure is symmetrical is called the line of Symmetry.
Symmetry forms the very basis of any geometrical figure. Today, every activity, from paintings to engineering and designing clothes and jewellery uses the idea of giving perfect Symmetry in its every artefact. Symmetry brings harmony in the design of any object, building or painting. The effect of perfect Symmetry can also be seen in natural things.
Natural things are the best examples of symmetrical objects. From beehives to leaves and flowers, every little thing is a wondrous work of Symmetry by nature. We know that a figure is in perfect Symmetry if a line of Symmetry passing through the centre divides the figure into identical halves. The two parts coinciding at this line of Symmetry is folded across this line which makes it symmetrical.