The word 'similarity' has great meaning in our lives. From an early age, we are asked to find objects that look 'similar' to each other. When a baby is born, all those around try to determine who it is like - father or mother; a new food tasting brings comparison to familiar foods; a visit to another country triggers the discussion of what is similar and what is different between this country and the place from which we arrived. In other words, searching for similarities between familiar phenomena and new phenomena accompanies us from an early age. As we get older, the concept of 'similarity' gains more and more meanings. One of them is the search for self-imaginative forms.

Definition: A geometric shape has a self-similarity feature if there is a point (at least one) in each environment that contains a copy of the whole shape.

 

Here are some examples to illustrate this point: