course description

The introduction of the Common Core standards inspired a change in the mindset of “basing transformations on congruence” to the more intuitive approach of “basing congruence on transformations.” In modern geometry, the traditional arguments justifying congruence and similarity are more effectively supported by rigid transformations and dilations. In this 3-week module, we examine how transformations are applied to justify congruence and similarity. Specific goals and activities include the following:

  • Examining and connecting properties of transformations through constructions using GeoGebra.
  • Experiencing the shift to justifying congruence and similarity through transformations.
  • Revisiting fundamental geometric theorems and proving them through transformations.

Created by The STREAM Team. Facilitated by Pat Baltzley, Math Education Consultant

type of course


This course will only be offered when we have 10 or more interested participants. Fill out this form and we'll reach out to you with potential dates when enough people sign up. 

course length 15 OPI Renewal Units audience HS Math Teachers

user rating

User Ratings: 3.5 3.5 stars