# Similarity

According to fundamental operations of plane geometry, a plane figure can be moved from one point o another point (called Translation), can be rotated about the fixed point (called Rotation) or can be expanded or contracted such that the distance between the points in the plane figure increases or decreases in the same ratio (called Expansion). IF any figure is subjected to any of these operations in succession will result to similar figure or one figure can be brought to coincide with another by using the above properties. We have noticed similar figures like the map of the world or country, model of a house or a dam, in all these cases the similar figures bear a constant ratio with the original. In this section let us discuss about the similarity and few problems based on similar figures.