Formative Assessment: Understanding Congruence
Common Core State Standards
Math 
Math 
HSG 
High School: Geometry 
CO 
Congruence 
B 
Understand congruence in terms of rigid motions 
6 
Use geometric descriptions of rigid motions to transform figures and to predict the effect of a given rigid motion on a given figure; given two figures, use the definition of congruence in terms of rigid motions to decide if they are congruent. 
Download Common Core State Standards (PDF 1.2 MB) 
Common Core State Standards
Math 
Math 
HSG 
High School: Geometry 
CO 
Congruence 
B 
Understand congruence in terms of rigid motions 
7 
Use the definition of congruence in terms of rigid motions to show that two triangles are congruent if and only if corresponding pairs of sides and corresponding pairs of angles are congruent. 
Download Common Core State Standards (PDF 1.2 MB) 
Common Core State Standards
Math 
Math 
HSG 
High School: Geometry 
CO 
Congruence 
B 
Understand congruence in terms of rigid motions 
8 
Explain how the criteria for triangle congruence (ASA, SAS, and SSS) follow from the definition of congruence in terms of rigid motions. 
Download Common Core State Standards (PDF 1.2 MB) 

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Lesson Objective
Formatively assess understanding of congruence in terms of rigid motions
Length
15 minutes
Questions to Consider
 Why does Ms. Pforts begin her class by asking students for realworld examples of congruent figures?
 Why does Ms. Pforts give the students graph paper and shapes in addition to the geometry software?
 How does Ms. Pforts know when students are ready to work on the extension activity?
Watch all the videos in this series: Formative Assessment Practices to Support Student Learning
Teacher & School Info

April Pforts
 School Details
 Mount Pleasant High School Mount Pleasant, IA
 Population
 637 students
 District Spending
 $7,463
Supporting Materials

Formative Assessment: Understanding Congruence Transcript

Formative Assessment Process.PDF

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