Homothety and Similarity
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This unit deals with some of the basic concepts of homothety (or enlargement) and some formulae connected to Thales' theorem. Rather than rigorous, step-by-step demonstrations, this unit offers the advantage of proving theories and properties in a straightforward manner. To conclude the unit, different examples of similarity in triangles and polygons in general is also focused on, through an interactive approach. There is an introduction to metric relations in a right-angled triangle: the theorem of the sides adjacent to the right angle and the perpendicular height theorem.
Knowledge area
Educational context
Resource type
Collections
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This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
End user
learner
Contributions
publisher
INTEF
11/01/2026
publisher
INTEF .
11/01/2026
publisher
INTEF
11/01/2026
author
Miguel García Reyes
11/01/2026
publisher
Instituto de Tecnologías Educativas (ITE)
11/01/2026
editor
Instituto de Tecnologías Educativas (ITE)
11/01/2026
technical validator
Mª Ana López Montes
11/01/2026