HSG-CO.A.1

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- HSG-CO.A.1Know precise definitions of angle, circle, perpendicular line, parallel line, and line segment, based on the undefined notions of point, line, distance along a line, and distance around a circular arc.
- HSG-CO.A.2Represent transformations in the plane using, e.g., transparencies and geometry software; describe transformations as functions that take points in the plane as inputs and give other points as outputs. Compare transformations that preserve distance and angle to those that do not (e.g., translation versus horizontal stretch).
- HSG-CO.A.3Given a rectangle, parallelogram, trapezoid, or regular polygon, describe the rotations and reflections that carry it onto itself.
- HSG-CO.A.4Develop definitions of rotations, reflections, and translations in terms of angles, circles, perpendicular lines, parallel lines, and line segments.
- HSG-CO.A.5Given a geometric figure and a rotation, reflection, or translation, draw the transformed figure using, e.g., graph paper, tracing paper, or geometry software. Specify a sequence of transformations that will carry a given figure onto another.

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## HSG-CO.A.1

## Know precise definitions of angle, circle, perpendicular line, parallel line, and line segment, based on the undefined notions of point, line, distance along a line, and distance around a circular arc.

46 Lesson(s)

### Models & Constructions Unit Quiz

Geometry »
Unit: Models and Constructions

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.

Standards:

Favorites
(3)

Resources
(31)

Reflections
(4)

### Cell Phone Towers

Geometry »
Unit: Models and Constructions

Geometry »
Unit: Models and Constructions

Big Idea:

#### What geo-locations lurk in our hearts? Your cell phone knows! Students analyze the region from which a call was made and discover a property of bisectors.

Standards:

Favorites
(11)

Resources
(26)

### Reviewing Geometric Models

Geometry »
Unit: Models and Constructions

Geometry »
Unit: Models and Constructions

Big Idea:

#### We have applied the properties of these objects in modeling situations. Now, what have we learned by "doing geometry"?

Standards:

Favorites
(6)

Resources
(27)

Reflections
(1)

### Finding Your Center

Geometry »
Unit: Models and Constructions

Geometry »
Unit: Models and Constructions

Big Idea:

#### If we know two points where a Wi-Fi signal has the same strength, can we find the hotspot? Not yet, but we can model the possible locations.

Standards:

Favorites
(7)

Resources
(24)

Reflections
(1)

### Submarine Smart Phone

Geometry »
Unit: Models and Constructions

Geometry »
Unit: Models and Constructions

Big Idea:

#### Using lines to represent information about the position of an object. I know where your cell phone fell into the water!

Standards:

Favorites
(7)

Resources
(26)

Reflections
(1)

Big Idea:

#### There's no doubt about it - we've got to know them! Important geometric definitions and vocabulary.

Standards:

Favorites
(28)

Resources
(29)

Reflections
(3)

### Tools of Geometry Unit Assessment

Geometry »
Unit: Tools of Geometry

Geometry »
Unit: Tools of Geometry

Big Idea:

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

Standards:

Favorites
(8)

Resources
(13)

Big Idea:

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

Standards:

Favorites
(1)

Resources
(40)

Reflections
(3)

Big Idea:

#### Students analyze the structure of polygons and learn how this structure can be used to represent a real-world phenomenon. Will Facebook make our brains grow larger?

Standards:

Favorites
(2)

Resources
(33)

Reflections
(4)

### Cell Phone 9-1-1

Geometry »
Unit: Models and Constructions

Geometry »
Unit: Models and Constructions

Big Idea:

#### Using circles to represent information about the position of an object. I know where your cell phone is located!

Standards:

Favorites
(4)

Resources
(32)

Reflections
(3)

### From Perpendiculars to Parallels

Geometry »
Unit: Congruence and Rigid Motions

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."

Standards:

Favorites
(3)

Resources
(29)

Reflections
(2)

### Reviewing Intersections

Geometry »
Unit: Dimension and Structure

Geometry »
Unit: Dimension and Structure

Big Idea:

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

Standards:

Favorites
(1)

Resources
(26)

Reflections
(2)

### Reviewing Structure

Geometry »
Unit: Dimension and Structure

Geometry »
Unit: Dimension and Structure

Big Idea:

#### Students review homework and assess their progress. How much have we learned?

Standards:

Favorites
(1)

Resources
(25)

Reflections
(1)

### Introduction to Geometry (Part 2)

Geometry »
Unit: Tools of Geometry

Geometry »
Unit: Tools of Geometry

Big Idea:

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

Standards:

Favorites
(12)

Resources
(19)

Reflections
(1)

### Reviewing Constructions

Geometry »
Unit: Models and Constructions

Geometry »
Unit: Models and Constructions

Big Idea:

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

Standards:

Favorites
(2)

Resources
(21)

Common Core Math

### Kindergarten

### First Grade

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### Seventh Grade

### HS Number & Quantity

### HS Algebra

### HS Functions

### HS Geometry

### Kindergarten

### First Grade

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### Third Grade

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### Fifth Grade

### Sixth Grade

### Seventh Grade

### Eighth Grade

### Ninth and Tenth Grade

### Kindergarten

### First grade

### Second grade

### Third Grade

### Fourth grade

### Fifth grade

### Middle School

Kindergarten

First Grade

Second Grade

Third Grade

Fourth Grade

Fifth Grade

Sixth Grade

Seventh Grade

HS Number & Quantity

HS Algebra

HS Functions

HS Geometry

Kindergarten

First Grade

Second Grade

Third Grade

Fourth Grade

Fifth Grade

Sixth Grade

Seventh Grade

Eighth Grade

Ninth and Tenth Grade

Kindergarten

First grade

Second grade

Third Grade

Fourth grade

Fifth grade

Middle School