Similar Triangles are very useful for indirectly determining the sizes of items which are difficult to measure by hand. Typical examples include building heights, tree heights, and tower heights. Similar Triangles can also be used to measure how wide a river or lake is.

Where is similarity used in real life?

For example, in real life, the front wheels of a vehicle, the hands of a human, two teacups, etc. are representations of congruent figures or objects. All identical shape items have the same form, but the measurements are different. The ∼ sign is used to symbolize similarity.

What is a similarity ratio used for?

The RATIO OF SIMILARITY between any two similar figures is the ratio of any pair of corresponding sides. Simply stated, once it is determined that two figures are similar, all of their pairs of corresponding sides have the same ratio.