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# Unit: Module 2: Similarity, proof, and trigonometry

#### 0

Possible mastery points

## Topic B: Dilations

Practice
Dilate pointsGet 3 of 4 questions to level up!
Dilations: scale factorGet 3 of 4 questions to level up!
Dilations: centerGet 3 of 4 questions to level up!
Dilate trianglesGet 3 of 4 questions to level up!
Dilations and propertiesGet 3 of 4 questions to level up!

#### Quiz 1

Level up on the above skills and collect up to 500 Mastery points

## Topic C: Lessons 12-14: Similarity intro

Practice
Similarity & transformationsGet 3 of 4 questions to level up!
Sequences of transformationsGet 3 of 4 questions to level up!

## Topic C: Lessons 15-17: Triangle similarity

Practice
Determine similar triangles: AnglesGet 3 of 4 questions to level up!
Determine similar triangles: SSSGet 3 of 4 questions to level up!
Solve similar triangles (basic)Get 3 of 4 questions to level up!
Solve similar triangles (advanced)Get 3 of 4 questions to level up!

## Topic C: Lessons 18-20: Similarity applications

#### Quiz 2

Level up on the above skills and collect up to 800 Mastery points

## Topic D: Applying similarity to right triangles

Practice
Simplify square rootsGet 3 of 4 questions to level up!
Simplify square roots (variables)Get 3 of 4 questions to level up!
Simplify square-root expressionsGet 3 of 4 questions to level up!

#### Quiz 3

Level up on the above skills and collect up to 300 Mastery points

## Topic E: Lesson 34: Unknown angles

Practice
Solve for an angle in right trianglesGet 3 of 4 questions to level up!

#### Quiz 4

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

## Topic E: Lessons 28-31: Trigonometry applications

Practice
Right triangle trigonometry word problemsGet 3 of 4 questions to level up!

## Topic E: Lessons 32-33: Laws of sines and cosines

#### Quiz 5

Level up on the above skills and collect up to 400 Mastery points
Up next for you:

#### Unit test

Level up on all the skills in this unit and collect up to 2400 Mastery points!

### About this unit

"Just as rigid motions are used to define congruence in Module 1, so dilations are added to define similarity in Module 2. To be able to discuss similarity, students must first have a clear understanding of how dilations behave. This is done in two parts, by studying how dilations yield scale drawings and reasoning why the properties of dilations must be true. Once dilations are clearly established, similarity transformations are defined and length and angle relationships are examined, yielding triangle similarity criteria. An in-depth look at similarity within right triangles follows, and finally the module ends with a study of right triangle trigonometry." Eureka Math/EngageNY (c) 2015 GreatMinds.org