REA que pretende abordar el tema de la semejanza desde otro punto de vista, desde 2º a 4º de Educación Secundaria Obligatoria.

This unit deals with some formulae connected to proportionality between segments and Thales' theorem. Rather than giving rigorous, step-by-step demonstrations, this unit offers the advantage of verifying conclusions and properties in a straightforward manner. To conclude, different examples of similarity in triangles and polygons in general is also focused on, using an interactive approach.