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Congruence and the Rigid Transformations
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Congruence and the Rigid Transformations

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Subject MathGeometry
Grade Level Grades 9-12
Resource Type Activity, Presentation
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About This Lesson

The Common Core State Standards call for teachers of geometry to radically change how they teach the topic of congruence. Key are the so-called Rigid Motions - flips, turns, and slides. In this pair of lessons, I define the Rigid Motions and then present the Rigid Motion Postulate, which states that the rigid motions preserve segment length and angle measure. Students are given opportunity to work with the Rigid Motions and are asked to prove a few simple congruence theorems.

Resources

Files

4.1_PP_The_Rigid_Motions.pptx

Presentation
February 10, 2020
207.87 KB

4.1_WS_The_Rigid_Motions.docx

Activity
February 13, 2020
223.28 KB

4.2_PP_Coincidence,_Congruence_and_the_Rigid_Motion_Postulate.pptx

Presentation
February 10, 2020
311.21 KB

4.2_WS_Coincidence,_Congruence_and_the_Rigid_Motion_Postulate.docx

Activity
February 13, 2020
34.76 KB

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