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Resource Name 
Topic (Course) 
Technology 
Type 
$? 
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Circles in the Plane

Circles (Geometry) 
Cabri Jr. 
Activity 

[0]

Students investigate the relationships between the equation of a circle, the length of its radius, and the coordinates of its center.
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Get in Line

Circles (Geometry) 
Calculator 
Activity 

[1]

A calculator activity involving perimeter and circumference.
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Archeology Problem

Chords (Geometry) 
Computer 
Lesson Plan 

[0]

This lesson/problem requires that students be able to construct chords to a circle and perpendicular lines in Geometer's Sketchpad.
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Euclid's Elements, Book I, Def...

Circles (Geometry) 
Computer 
Support Material 

[0]

Gives Euclid's original definitions of boundaries and figures and then examines the definitions' validity and durability.
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Geometry, Section 2

Circles (Geometry) 
Computer 
Support Material 

[0]

A collection of illustrated concepts including problems for students to work out, and standalone word problems. Includes automated feedback. Pre and posttests, answer sheets, additional help, tools,...
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Spirograph Machine, or Tea cup...

Circles (Geometry) 
Computer 
Lesson Plan 

[0]

This lab studies the effects (both mathematical and artistic) of circular motion as points rotate around circles. Interesting things occur when a point moves around a circle as the circle rotates arou...
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The Circle

Circles (Geometry) 
Computer 
Support Material 

[0]

Provides you with the definitions of circle, radius, diameter, and circumference.
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The Geometer's Sketchpad Equat...

Circles (Geometry) 
Computer 
Lesson Plan 

[0]

This activity guides students to discovering the equation of a circle.
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The Radian

Circumference (Geometry) 
Computer 
Support Material 

[0]

Provides an illustration and description of radians and how they relate to a circle.
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Area of a Circle

Circles (Geometry) 
Flash 
Tool 

[0]

Flashbased introduction to finding the area of a circle, given the radius. College Cram charges access fees by the month or by the semester for most resources. To get a preview of their tools, se...
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Area of a Circle (Geometry)

Circles (Geometry) 
Flash 
Support Material 

[0]

This mini lesson explains the formula used to calculate the area of a circle.
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Circle Geometry Whiteboard Min...

Radius (Geometry)+ 
Flash 
Tool 

[0]

Teach your geometry students advanced circle concepts with this set of interactive whiteboard minimovies. Animated flash cards bring the concepts to life while the interactive circle allows you to cr...
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Circle: Arcs, Chords, Tangents...

Circles (Geometry) 
Flash 
Support Material 

[0]

This minilesson explains some parts of circles that lie on or inside the circle but with special names, including major and minor arcs, chords, tangents, sectors, segments, and secants.
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Circles (Getting Started: Geom...

Circles (Geometry) 
Flash 
Support Material 

[0]

This minilesson explains the geometry of circles and the relationship between different parts of the circle.
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Circumference of a Circle

Circumference (Geometry) 
Flash 
Tool 

[0]

Flashbased introduction to finding the circumference of a circle, given the radius. College Cram charges access fees by the month or by the semester for most resources. To get a preview of their ...
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Circumference of a Circle (Geo...

Circumference (Geometry) 
Flash 
Support Material 

[0]

This minilesson defines and explains the basics of a circle: radius, diameter, circumference and their relationship. It will also guide you through determining the circumference of a circle given a r...
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Constructing a hexagon inscrib...

Circles (Geometry) 
Flash 
Tool 

[0]

An interactive applet and associated web page that provide stepbystep instructions on how to construct
a hexagon inscribed in a circle using only a compass and straightedge.
The method begin...
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Constructing a pentagon inscri...

Circles (Geometry) 
Flash 
Tool 

[0]

An interactive applet and associated web page that provide stepbystep instructions on how to construct
a pentagon inscribed in a circle using only a compass and straightedge.
The method begins...
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Equation of a Circle

Circles (Geometry) 
Flash 
Tool 

[0]

Flash introduction to finding the equation of a circle from its center and radius, and vice versa. College Cram charges access fees by the month or by the semester for most resources. This one, th...
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Equation of a Circle in Standa...

Circles (Geometry) 
Flash 
Support Material 

[0]

This minilesson explains how to obtain and use the standard form of the equation of a circle, as well as how to convert between the standard and general form.
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Inscribed and Circumscribed Po...

Circles (Geometry) 
Flash 
Support Material 

[0]

This minilesson explains concepts of and relationships between inscribed and circumscribed polygons.
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Interactive Circle

Circles (Geometry)+ 
Flash 
Tool 

[1]

Use the interactive circle to create the following circle parts:
Radius
Diameter
Tangent
Chord
Sector
Inscribed Angles
Central Angle
Segment
Ar...
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Measuring Circles (Geometry)

Circles (Geometry) 
Flash 
Support Material 

[0]

This minilesson explains more about measuring circles, including segment lengths and angle measures, as well as using the relationship of circumference to diameter.
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Perimeter and Circumference (G...

Circumference (Geometry) 
Flash 
Support Material 

[0]

This minilesson explains how to find the pperimeter and circumference of geometric shapes.
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Radians

Angles (Geometry) 
Flash 
Tool 

[2]

Flashbased introduction to converting between degrees and radians. College Cram charges access fees by the month or by the semester for most resources. To get a preview of their tools, see their ...
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