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Marisa Laks

Geometry

The Global Learning Collaborative

New York, NY

Urban Environment

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View all Master TeachersGeometry

(14 Units, 97 Lessons)

Unit 10 - Similarity in Triangles(10 Lessons)

Unit 1 - Preparing for the Geometry Course(2 Lessons)

Unit 2 - Geometric Constructions(13 Lessons)

Unit 3 - Transformational Geometry(10 Lessons)

Unit 4 - Rigid Motions(3 Lessons)

Unit 5 - Fall Interim Assessment: Geometry Intro, Constructions and Rigid Motion(5 Lessons)

Unit 6 - Introduction to Geometric Proofs(10 Lessons)

Unit 7 - Proofs about Triangles(11 Lessons)

Unit 8 - Common Core Geometry Midcourse Assessment(5 Lessons)

Unit 9 - Proofs about Parallelograms(10 Lessons)

Unit 10 - Similarity in Triangles(10 Lessons)

Unit 11 - Geometric Trigonometry(3 Lessons)

Unit 12 - The Third Dimension(5 Lessons)

Unit 13 - Geometric Modeling(3 Lessons)

Unit 14 - Final Assessment(7 Lessons)

Scale Factor

Geometry

Â» Unit:

Similarity in Triangles

Big Idea:Students use examples from the book Aliceâs Adventures in Wonderland to explore the concept of scale factor.

14 Resources

9 Favorites

14 Resources

9 Favorites

Dilations on the Coordinate Plane, Center (0, 0)

Geometry

Â» Unit:

Similarity in Triangles

Big Idea:Students dilate objects on the coordinate plane and identify the scale factor of dilations that take a pre-image to an image.

16 Resources

2 Favorites

16 Resources

2 Favorites

Dilations using Geometer's Sketchpad

Geometry

Â» Unit:

Similarity in Triangles

Big Idea:Students using Geometer's Sketchpad to investigate dilations about a variety of centers.

13 Resources

1 Favorite

13 Resources

1 Favorite

Dilations on the Coordinate Plane, Center (h, k)

Geometry

Â» Unit:

Similarity in Triangles

Big Idea:Students will practice performing and describing dilations with centers other than (0, 0) and scale factors greater than one or between zero and one.

19 Resources

3 Favorites

19 Resources

3 Favorites

Properties of Dilations Extension Lesson

Geometry

Â» Unit:

Similarity in Triangles

Big Idea:Students will investigate how to perform a dilation about a center (h, k) without graphing the object.

14 Resources

2 Favorites

14 Resources

2 Favorites

Similar Triangles using Geometer's Sketchpad

Geometry

Â» Unit:

Similarity in Triangles

Big Idea:Students use Geometer's Sketchpad to investigate properties of similar triangles, which share a vertex and have parallel bases.

15 Resources

2 Favorites

15 Resources

2 Favorites

Finding Missing Sides of Similar Triangles

Geometry

Â» Unit:

Similarity in Triangles

Big Idea:Students will use the criteria for similarity to find the measures of missing sides of a triangle.

17 Resources

9 Favorites

17 Resources

9 Favorites

Angle-Angle Similarity Postulate

Geometry

Â» Unit:

Similarity in Triangles

Big Idea:Students use a variety of tools such as patty paper, rulers, and protractors to prove triangles are similar by comparing angle measurements.

15 Resources

4 Favorites

15 Resources

4 Favorites

Similar Triangle Practice

Geometry

Â» Unit:

Similarity in Triangles

Big Idea:In this lesson, students apply the properties and theorems studied throughout the unit to justify that triangles are similar.

17 Resources

4 Favorites

17 Resources

4 Favorites

Similar Triangles and the Flatiron Building

Geometry

Â» Unit:

Similarity in Triangles

Big Idea:The Flatiron Building located in New York City is one of the most iconic buildings in the country. Its unique triangular shape makes it a great subject for mathematical investigations.

17 Resources

9 Favorites

17 Resources

9 Favorites