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# Similarity 1

Lesson 13 of 18

## Objective: SWBAT explore similarity through dilation.

#### Warm Up

*10 min*

Each day, students complete a warm-up that usually consists of spiraling the previous day's material, in addition to older material. Warm-up problems also sometimes extend lessons that students have encountered before to more unfamiliar contexts.

For a video narrative about how I structure each lesson, and how the warm-up fits in, click here.

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#### Huddle

*10 min*

For the huddle for this lesson, I like to talk about #9 and #10... it pushes the kids' thinking since they are oriented differently. I also spend a good amount of time on #11, and I ask, "what do you think is a popular WRONG answer choice that kids choose, and why?" It opens up a good discussion.

I usually group students according to the following:

- the front row (6 seats) are reserved for kids who are best served by working with me. These are generally the middle low kids - not necessarily the lowest kids.

- the most struggling students are seated next to a strong tutor, as they require more than small-group attention, they need 1-on-1 tutoring as the lesson goes by.

- most middle students are seated next to a a strong-middle student, to maximize the quality of their discussion.

I think about the entire seating chart in pairs.

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#### Homework

*15 min*

Homework is to be completed at home and should take students approximately 15 minutes.

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I love all your videos but this one seemed difficult to follow due to the camera moving all over, thanks for all your amazing work.

| one year ago | Reply*Responding to Cee Aguilar*

Cee - thanks so much for your kind note. I am glad that you found this helpful! Hope all is well. - Jeff

| 3 years ago | Reply

I was looking for a lesson that looked at similarity through the lens of dilations. This lesson did the trick. Thank you.

| 3 years ago | Reply*expand comments*

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- UNIT 1: FLUENCIES AND THE LANGUAGE OF ALGEBRA
- UNIT 2: SOLVING LINEAR EQUATIONS
- UNIT 3: INTRODUCTION TO FUNCTIONS
- UNIT 4: INTERPRETING AND COMPARING LINEAR FUNCTIONS
- UNIT 5: SYSTEMS OF LINEAR EQUATIONS
- UNIT 6: EXPONENTS AND SCIENTIFIC NOTATION
- UNIT 7: PARALLEL LINES, TRANSVERSALS, AND TRIANGLES
- UNIT 8: CONGRUENCE AND SIMILARITY THROUGH TRANSFORMATIONS
- UNIT 9: PATTERNS OF ASSOCIATION IN BIVARIATE DATA
- UNIT 10: SLOPE REVISITED
- UNIT 11: VOLUME OF CYLINDERS, CONES, AND SPHERES
- UNIT 12: POLYNOMIALS AND FACTORING
- UNIT 13: QUADRATIC FUNCTIONS

- LESSON 1: Introduction to congruence and similarity through transformations
- LESSON 2: Translations 1
- LESSON 3: Translations 2
- LESSON 4: Reflections 1
- LESSON 5: Reflections 2
- LESSON 6: Reflections 3
- LESSON 7: Rotations 1
- LESSON 8: Rotations 2
- LESSON 9: Mixed Review - Transformations
- LESSON 10: Congruence and Similarity Through Transformations Test 1
- LESSON 11: Dilations 1
- LESSON 12: Dilations 2
- LESSON 13: Similarity 1
- LESSON 14: Similarity 2
- LESSON 15: Series of Transformations that Lead to Congruence
- LESSON 16: Series of Transformations that Lead to Similarity
- LESSON 17: Mixed Review - Transformations
- LESSON 18: Congruence and Similarity Through Transformations Unit Test