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- HSG-CO.B.6Use geometric descriptions of rigid motions to transform figures and to predict the effect of a given rigid motion on a given figure; given two figures, use the definition of congruence in terms of rigid motions to decide if they are congruent.
- HSG-CO.B.7Use the definition of congruence in terms of rigid motions to show that two triangles are congruent if and only if corresponding pairs of sides and corresponding pairs of angles are congruent.
- HSG-CO.B.8Explain how the criteria for triangle congruence (ASA, SAS, and SSS) follow from the definition of congruence in terms of rigid motions.

Transformations + Similarity

Geometry

» Unit:

Sweet Similar Shapes

Big Idea:Students will use a pair-share activity and activate their prior knowledge to discover how transformations connect to AA criterion.

Stephanie Conklin

Suburban Env.

16 Resources

9 Favorites

16 Resources

9 Favorites

From Perpendiculars to Parallels

Geometry

» Unit:

Congruence and Rigid Motions

Big Idea:Students consolidate and extend their knowledge of constructions related to bisectors: "A perpendicular to a perpendicular is a parallel."

Tom Chandler

Rural Env.

29 Resources

3 Favorites

29 Resources

3 Favorites

Bisector Bonanza

Geometry

» Unit:

Congruence and Rigid Motions

Big Idea:Students use compass and straight-edge, aided by tracing paper and paper-folding, to explore the properties of bisectors, while gaining insights into the workings of transformations.

Tom Chandler

Rural Env.

26 Resources

3 Favorites

26 Resources

3 Favorites

Reviewing Congruence

Geometry

» Unit:

Congruence and Rigid Motions

Big Idea:Students review homework and assess their progress. How much have we learned?

Tom Chandler

Rural Env.

27 Resources

2 Favorites

27 Resources

2 Favorites

Discovering Similar Triangles

Geometry

» Unit:

Sweet Similar Shapes

Big Idea:Completing a hands-on activity, students will cut, categorize and discover properties of similar triangles.

Stephanie Conklin

Suburban Env.

29 Resources

22 Favorites

29 Resources

22 Favorites

Rigid Motions and Congruence

Geometry

» Unit:

Rigid Motions

Big Idea:Students will build on prior knowledge to develop a definition of congruence in terms of rigid motion.

Marisa Laks

Urban Env.

20 Resources

12 Favorites

20 Resources

12 Favorites

Fall Interim Assessment

Geometry

» Unit:

Fall Interim Assessment: Geometry Intro, Constructions and Rigid Motion

Big Idea:This is a comprehensive assessment of Units 1, 2 and 3.

Marisa Laks

Urban Env.

6 Resources

4 Favorites

6 Resources

4 Favorites

Rotations in the Coordinate Plane

8th Grade Math

» Unit:

Transformations

Big Idea:Transition students from using tracing paper to perform rotations into using coordinates and realizing the pattern of rotating in multiples of 90 degrees about the origin.

Christa Lemily

Suburban Env.

11 Resources

8 Favorites

11 Resources

8 Favorites

Rigid Motion, Congruent Triangles, and Proof

Geometry

» Unit:

Polygons and Congruent Triangle Proofs

Big Idea:Using the method of flow chart proofs, students begin to develop the skills necessary to understand and create congruent triangle proofs.

Beth Menzie

Urban Env.

14 Resources

3 Favorites

14 Resources

3 Favorites

Congruent Triangles Based on Rigid Motions

Geometry

» Unit:

Rigid Motions

Big Idea:Students will examine triangles on the coordinate plane and use rigid motions to show two triangles are congruent.

Marisa Laks

Urban Env.

20 Resources

11 Favorites

20 Resources

11 Favorites

Dilation Nation

Geometry

» Unit:

Transformers and Transformations

Big Idea:Students will review transformations using a brain pop and learn how to geometrically enlarge and shrink shapes.

Stephanie Conklin

Suburban Env.

15 Resources

3 Favorites

15 Resources

3 Favorites

Four Triangles

Geometry

» Unit:

Creating Classroom Culture to Develop the Math Practices

Big Idea:Students will engage in a hands-on activity through which they will be introduced to the notion of proof by exhaustion as well as one of the big ideas of geometry: classifying and differentiating.

Jessica Uy

Suburban Env.

19 Resources

8 Favorites

19 Resources

8 Favorites

Four Triangles Sorting Activity

Geometry

» Unit:

Creating Classroom Culture to Develop the Math Practices

Big Idea:Students will take risks and build a sense of community as they share working definitions of their criterion and show how their four-triangle figures exemplify that criterion with their peers.

Jessica Uy

Suburban Env.

18 Resources

2 Favorites

18 Resources

2 Favorites

Rigid Motion and Congruence Unit Quiz

Geometry

» Unit:

Congruence and Rigid Motions

Big Idea:Students complete the summative assessment for the unit. Game Day!

Tom Chandler

Rural Env.

16 Resources

1 Favorite

16 Resources

1 Favorite

More Discovering Similar Triangles

Geometry

» Unit:

Sweet Similar Shapes

Big Idea:Students will finish discovering key properties of similar triangles and will practice identifying if two shapes are similar.

Stephanie Conklin

Suburban Env.

14 Resources

2 Favorites

14 Resources

2 Favorites

HSG-CO.B.6

Use geometric descriptions of rigid motions to transform figures and to predict the effect of a given rigid motion on a given figure; given two figures, use the definition of congruence in terms of rigid motions to decide if they are congruent.

HSG-CO.B.7

Use the definition of congruence in terms of rigid motions to show that two triangles are congruent if and only if corresponding pairs of sides and corresponding pairs of angles are congruent.

HSG-CO.B.8

Explain how the criteria for triangle congruence (ASA, SAS, and SSS) follow from the definition of congruence in terms of rigid motions.