In simple language we can say that an object has symmetry, if it has some special characteristics, such as pleasing designs, while we look at it. As an example, when we see the telephone posts or electric lamp posts, we say that there is symmetry because they are arranged in a straight line at equal distance. Similarly, when we look at the gates of houses, they will appear symmetric because of their designs. Naturally, our eyes will compare the design on one half of the gate with that of the other half and if they find some characteristic feature such as mirror image or other, then we feel there is symmetry. A suspension bridge, a butterfly, the rose petal etc. are some examples to show the pleasing designs and hence, they are symmetric.