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- HSG-CO.D.12Make formal geometric constructions with a variety of tools and methods (compass and straightedge, string, reflective devices, paper folding, dynamic geometric software, etc.). Copying a segment; copying an angle; bisecting a segment; bisecting an angle; constructing perpendicular lines, including the perpendicular bisector of a line segment; and constructing a line parallel to a given line through a point not on the line.
- HSG-CO.D.13Construct an equilateral triangle, a square, and a regular hexagon inscribed in a circle.

HSG-CO.D.12

Make formal geometric constructions with a variety of tools and methods (compass and straightedge, string, reflective devices, paper folding, dynamic geometric software, etc.). Copying a segment; copying an angle; bisecting a segment; bisecting an angle; constructing perpendicular lines, including the perpendicular bisector of a line segment; and constructing a line parallel to a given line through a point not on the line.

Line It Up!

Geometry

» Unit:

Line-sanity!

Big Idea:In this student-centered lesson, students work together to construct parallel and perpendicular lines while also writing equations for these lines.

Stephanie Conklin

Suburban Env.

39 Resources

6 Favorites

39 Resources

6 Favorites

Models & Constructions Unit Quiz

Geometry

» Unit:

Models and Constructions

Big Idea:Students show what they have learned: from vocabulary and basic skills to an application in an unfamiliar context.

Tom Chandler

Rural Env.

31 Resources

3 Favorites

31 Resources

3 Favorites

Intersection Logic

Geometry

» Unit:

Dimension and Structure

Big Idea:Using conjectures about intersections to justify a claim: students find the right argument to make their case.

Tom Chandler

Rural Env.

28 Resources

1 Favorite

28 Resources

1 Favorite

Tools of Geometry Unit Assessment

Geometry

» Unit:

Tools of Geometry

Big Idea:Test time! Students take the first unit assessment, aligned to the Common Core standards for this unit.

Beth Menzie

Urban Env.

13 Resources

8 Favorites

13 Resources

8 Favorites

Algebra and Angle Pairs

Geometry

» Unit:

Tools of Geometry

Big Idea:More basics of Geometry: Drawing diagrams, identifying and naming angles and angle pairs, and solving algebraic problems involving angle pairs. And an answer to that eternal question - why can't we just measure instead of doing constructions?

Beth Menzie

Urban Env.

16 Resources

9 Favorites

16 Resources

9 Favorites

Going Halvesies

Geometry

» Unit:

Models and Constructions

Big Idea:What are the properties of a bisector? Students see for themselves--and find that a compass is an efficient instrument for comparing distances.

Tom Chandler

Rural Env.

27 Resources

3 Favorites

27 Resources

3 Favorites

Angle Management

Geometry

» Unit:

Dimension and Structure

Big Idea:Using constructions to understand the structure of an angle and to model the operation of a navigator's position-finder.

Tom Chandler

Rural Env.

40 Resources

1 Favorite

40 Resources

1 Favorite

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 Intersections

Geometry

» Unit:

Dimension and Structure

Big Idea:Students review homework and complete their learning portfolios for the unit. How much have we learned?

Tom Chandler

Rural Env.

26 Resources

1 Favorite

26 Resources

1 Favorite

Reviewing Structure

Geometry

» Unit:

Dimension and Structure

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

Tom Chandler

Rural Env.

25 Resources

1 Favorite

25 Resources

1 Favorite

Introduction to Geometry (Part 2)

Geometry

» Unit:

Tools of Geometry

Big Idea:It's all about angles! Angles, angle pairs, and how to bisect them.

Beth Menzie

Urban Env.

19 Resources

13 Favorites

19 Resources

13 Favorites

Reviewing Constructions

Geometry

» Unit:

Models and Constructions

Big Idea:Students review homework and complete their learning portfolios for the unit. How much have we learned?

Tom Chandler

Rural Env.

21 Resources

2 Favorites

21 Resources

2 Favorites

Pulling It All Together: Tools of Geometry Unit Review

Geometry

» Unit:

Tools of Geometry

Big Idea:Time to pull it all together! Students work cooperatively, applying the concepts of this unit in preparation for the unit test.

Beth Menzie

Urban Env.

17 Resources

4 Favorites

17 Resources

4 Favorites

Composition of Transformations

Geometry

» Unit:

Transformations

Big Idea:Students are challenged to create their own series of successive transformations. In this process, they teach themselves about composition and enhance their understanding of transformations.

Beth Menzie

Urban Env.

19 Resources

15 Favorites

19 Resources

15 Favorites

HSG-CO.D.12

Make formal geometric constructions with a variety of tools and methods (compass and straightedge, string, reflective devices, paper folding, dynamic geometric software, etc.). Copying a segment; copying an angle; bisecting a segment; bisecting an angle; constructing perpendicular lines, including the perpendicular bisector of a line segment; and constructing a line parallel to a given line through a point not on the line.

HSG-CO.D.13

Construct an equilateral triangle, a square, and a regular hexagon inscribed in a circle.