How do you determine if triangles or any polygons are similar?

For example, all equilateral triangles are similar and all squares are similar. If two polygons are similar, we know the lengths of corresponding sides are proportional. In similar polygons, the ratio of one side of a polygon to the corresponding side of the other is called the scale factor.

Dos polígonos son semejantes si los ángulos correspondientes son iguales y los lados correspondientes son proporcionales. Los elementos que se corresponden se llaman homólogos. Se llama razón de semejanza r a la constante de proporcionalidad entre los lados homólogos.

pretty sure its 8

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