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- 8.G.A.1Verify experimentally the properties of rotations, reflections, and translations:
- 8.G.A.2Understand that a two-dimensional figure is congruent to another if the second can be obtained from the first by a sequence of rotations, reflections, and translations; given two congruent figures, describe a sequence that exhibits the congruence between them.
- 8.G.A.3Describe the effect of dilations, translations, rotations and reflections on two-dimensional figures using coordinates.
- 8.G.A.4Understand that a two-dimensional figure is similar to another if the second can be obtained from the first by a sequence of rotations, reflections, translations, and dilations; given two similar two-dimensional figures, describe a sequence that exhibits the similarity between them.
- 8.G.A.5Use informal arguments to establish facts about the angle sum and exterior angle of triangles, about the angles created when parallel lines are cut by a transversal, and the angle-angle criterion for similarity of triangles. For example, arrange three copies of the same triangle so that the sum of the three angles appears to form a line, and give an argument in terms of transversals why this is so.

Hands-on Exploring the Movement of Reflections in the Plane

8th Grade Math

» Unit:

Transformations

Big Idea:Students learn about the movement of a reflection through using tracing paper.

Christa Lemily

Suburban Env.

13 Resources

25 Favorites

13 Resources

25 Favorites

Translations (Day 1 of 2)

8th Grade Math

» Unit:

Congruence and Similarity

Big Idea:Adding fixed numbers to each of the coordinates of
a figure has the effect of sliding or translating the figure.

Mauricio Beltre

Urban Env.

14 Resources

30 Favorites

14 Resources

30 Favorites

Playing with Parabolas - Hands on

8th Grade Math

» Unit:

Advanced Equations and Functions

Big Idea:Students become acquainted with simple quadratic equations! They graph and explore parabolas and gain their first experiences with quadratic function vocabulary and transformations.

Mauricio Beltre

Urban Env.

17 Resources

10 Favorites

17 Resources

10 Favorites

Exploring Angle Relationships Along Parallel Lines

8th Grade Math

» Unit:

Transformations

Big Idea:I Like to Move it Move it, Move Angle Measures Along a Transversal to Map Relationships

Christa Lemily

Suburban Env.

14 Resources

10 Favorites

14 Resources

10 Favorites

Exploring Reflections 2

8th Grade Math

» Unit:

Congruence and Similarity

Big Idea:Students see that the image of a figure can be found by locating the images of enough points to determine the figure.

Mauricio Beltre

Urban Env.

13 Resources

7 Favorites

13 Resources

7 Favorites

Angle Relationships Along Parallel Lines Completed

8th Grade Math

» Unit:

Transformations

Big Idea:I Like to Move it Move it, Move Angle Measures Along a Transversal to Map Relationships

Christa Lemily

Suburban Env.

20 Resources

9 Favorites

20 Resources

9 Favorites

Introduction to congruence and similarity through transformations

8th Grade Math

» Unit:

CONGRUENCE AND SIMILARITY THROUGH TRANSFORMATIONS

Big Idea:Which one of these is not like the other? Investigate how Sesame Street is connected to congruence and similarity.

Jeff Li MTP

Urban Env.

16 Resources

35 Favorites

16 Resources

35 Favorites

Translations 1

8th Grade Math

» Unit:

CONGRUENCE AND SIMILARITY THROUGH TRANSFORMATIONS

Big Idea:Set the foundation for students' knowledge of and fluency with translations.

Jeff Li MTP

Urban Env.

17 Resources

17 Favorites

17 Resources

17 Favorites

Rotations 1

8th Grade Math

» Unit:

CONGRUENCE AND SIMILARITY THROUGH TRANSFORMATIONS

Big Idea:Set the foundation for students' understanding of rotations about the origin - link it to tether ball!

Jeff Li MTP

Urban Env.

15 Resources

12 Favorites

15 Resources

12 Favorites

Dilations 1

8th Grade Math

» Unit:

CONGRUENCE AND SIMILARITY THROUGH TRANSFORMATIONS

Big Idea:Biggie or Smalls? Set the foundation for students' understanding of dilations, and use Geogebra to illustrate.

Jeff Li MTP

Urban Env.

15 Resources

20 Favorites

15 Resources

20 Favorites

Mixed Review - Transformations

8th Grade Math

» Unit:

CONGRUENCE AND SIMILARITY THROUGH TRANSFORMATIONS

Big Idea:Deepen students' understanding by putting together the last 8 days of learning into one day. Incredibly important to consolidate their understanding before moving on!

Jeff Li MTP

Urban Env.

19 Resources

9 Favorites

19 Resources

9 Favorites

Mixed Review - Transformations

8th Grade Math

» Unit:

CONGRUENCE AND SIMILARITY THROUGH TRANSFORMATIONS

Big Idea:Consolidate students' knowledge of and fluency with transformations by reviewing the first 16 days of the unit. Incredibly important to ensure student retention!

Jeff Li MTP

Urban Env.

15 Resources

6 Favorites

15 Resources

6 Favorites

Reflections 1

8th Grade Math

» Unit:

CONGRUENCE AND SIMILARITY THROUGH TRANSFORMATIONS

Big Idea:Use geomirrors to set the foundation for students' understanding of reflections, only across the axes.

Jeff Li MTP

Urban Env.

15 Resources

12 Favorites

15 Resources

12 Favorites

Rotations 2

8th Grade Math

» Unit:

CONGRUENCE AND SIMILARITY THROUGH TRANSFORMATIONS

Big Idea:Get kids fluent in rotations by providing them with a lot of independent practice with rotations!

Jeff Li MTP

Urban Env.

15 Resources

5 Favorites

15 Resources

5 Favorites

Reflections 2

8th Grade Math

» Unit:

CONGRUENCE AND SIMILARITY THROUGH TRANSFORMATIONS

Big Idea:Can you reflect objects without the geomirrors? Push kids to apply the idea of equal distance from the line of reflection.

Jeff Li MTP

Urban Env.

15 Resources

6 Favorites

15 Resources

6 Favorites

8.G.A.1a

Lines are taken to lines, and line segments to line segments of the same length.

8.G.A.1b

Angles are taken to angles of the same measure.

8.G.A.1c

Parallel lines are taken to parallel lines