Transformations and triangle congruence and similarity criteria

While we are all waiting eagerly for the geometry progression I thought people might be interested in this article by Henri Picciotto and Lew Douglas on a transformational approach to the criteria for triangle congruence and similarity. There is also lots of other good stuff on Henri’s transformational geometry page.

About Bill McCallum

I was born in Australia and came to the United States to pursue a Ph. D. in mathematics at Harvard University, met my wife, and never went back. I am a professor at the University of Arizona, working in number theory and mathematics education.
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One Response to Transformations and triangle congruence and similarity criteria

  1. Ted Coe says:

    That’s a very helpful document. Thanks for sharing!