## Derive using similarity the fact that the length of the arc intercepted by an angle is proportional to the radius, and define the radian measure of the angle as the constant of proportionality; derive the formula for the area of a sector.

15 Lesson(s)

### Sector Area Application: The Grazing Goat

Geometry » Unit: Geometric Measurement and Dimension
Geometry » Unit: Geometric Measurement and Dimension
Sunnyvale, CA
Environment: Suburban

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Favorites (2)

Resources (12)

Reflections (1)

### Strategies for Decomposing 2-D Figures

Geometry » Unit: Geometric Measurement and Dimension
Geometry » Unit: Geometric Measurement and Dimension
Sunnyvale, CA
Environment: Suburban

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Favorites (3)

Resources (19)

Reflections (1)

### Circumference-Diameter Ratio and Arc Length

Geometry » Unit: Discovering and Proving Circles Properties
Geometry » Unit: Discovering and Proving Circles Properties
Sunnyvale, CA
Environment: Suburban

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Standards:

Favorites (10)

Resources (13)

Reflections (1)

### Sectors of Circles

Geometry » Unit: Geometric Measurement and Dimension
Geometry » Unit: Geometric Measurement and Dimension
Sunnyvale, CA
Environment: Suburban

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Favorites (3)

Resources (10)

Reflections (2)

### Extreme Couponing: Pizza Edition

Geometry » Unit: Geometric Measurement and Dimension
Geometry » Unit: Geometric Measurement and Dimension
Sunnyvale, CA
Environment: Suburban

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Standards:

Favorites (2)

Resources (7)

### Riding a Ferris Wheel - Day 2 of 2

12th Grade Math » Unit: Trigonometric Functions
12th Grade Math » Unit: Trigonometric Functions
Troy, MI
Environment: Suburban

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Favorites (5)

Resources (10)

Reflections (1)

### Arc Length and Sector Area

12th Grade Math » Unit: Trigonometry: Circles
12th Grade Math » Unit: Trigonometry: Circles
Worcester, MA
Environment: Urban

Big Idea:

#### Students find their friend similarity lurking in a table of repeated calculations. A firm concept of radian measure follows close behind.

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Favorites (12)

Resources (14)

Geometry » Unit: Circles
Saratoga Springs, NY
Environment: Suburban

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Resources (14)

### Is John Guilty

12th Grade Math » Unit: Trigonometry as a Real-Valued Functions
12th Grade Math » Unit: Trigonometry as a Real-Valued Functions
Independence, MO
Environment: Suburban

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#### By analyzing data from an accident students will determine whether a driver was speeding when he wrecked his vehicle.

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Resources (19)

Reflections (2)

12th Grade Math » Unit: Trigonometry: Circles
12th Grade Math » Unit: Trigonometry: Circles
Worcester, MA
Environment: Urban

Big Idea:

Standards:

Resources (13)

### Area "Quest"

Geometry » Unit: Geometric Measurement and Dimension
Geometry » Unit: Geometric Measurement and Dimension
Sunnyvale, CA
Environment: Suburban

Big Idea:

#### On this unit assessment, students will demonstrate their understanding of area on problems of varying difficulty.

Standards:

Favorites (2)

Resources (8)

Reflections (1)

Geometry » Unit: Unit Circle Trigonmetry
Environment: Suburban

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Favorites (5)

Resources (11)

Reflections (1)

### Review of Circles Learning Targets

12th Grade Math » Unit: Trigonometry: Circles
12th Grade Math » Unit: Trigonometry: Circles
Worcester, MA
Environment: Urban

Big Idea:

#### Students work together to review and synthesize their knowledge of circles.

Standards:

Resources (10)

Geometry » Unit: Unit Circle Trigonmetry
Geometry » Unit: Unit Circle Trigonmetry
Environment: Suburban

Big Idea:

Standards:

Resources (15)

Reflections (1)

### Unit 3 Exam

12th Grade Math » Unit: Trigonometry: The Unit Circle
12th Grade Math » Unit: Trigonometry: The Unit Circle
Worcester, MA
Environment: Urban

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Standards:

Resources (4)
Common Core Math