Grade 8 Mathematics Module 2, Topic A, Overview

Girl at Desk

Throughout Topic A, on the definitions and properties of the basic rigid motions, students verify experimentally their basic properties and, when feasible, deepen their understanding of these properties using reasoning.  In particular, what students learned in Grade 4 about angles and angle measurement (4.MD.5) will be put to good use here:  they learn that the basic rigid motions preserve angle measurements, as well as segment lengths. 

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Common Core Learning Standards

CCLS State Standard
8.G.1 Verify experimentally the properties of rotations, reflections, and translations:

Curriculum Map