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# Unit 1: Module 1: Congruence, proof, and constructions

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"Module 1 embodies critical changes in Geometry as outlined by the Common Core. The heart of the module is the study of transformations and the role transformations play in defining congruence. The topic of transformations is introduced in a primarily experiential manner in Grade 8 and is formalized in Grade 10 with the use of precise language. The need for clear use of language is emphasized through vocabulary, the process of writing steps to perform constructions, and ultimately as part of the proof-writing process." Eureka Math/EngageNY (c) 2015 GreatMinds.org

## Topic B: Lessons 9-11: Unknown angle proofs

#### Quiz 1

Level up on the above skills and collect up to 560 Mastery points

## Topic C: Lesson 13: Rotations

### Practice

#### Quiz 2

Level up on the above skills and collect up to 320 Mastery points

## Topic C: Lesson 15: Rotations, reflections, and symmetry

### Practice

#### Quiz 3

Level up on the above skills and collect up to 400 Mastery points

## Topic C: Lessons 17-21: Applications of transformations

### Practice

#### Quiz 4

Level up on the above skills and collect up to 560 Mastery points

## Topic D: Lessons 26-27: Triangle congruency proofs

#### Quiz 5

Level up on the above skills and collect up to 240 Mastery points
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#### Unit test

Level up on all the skills in this unit and collect up to 2600 Mastery points!