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Topic (Course) 
Technology 
Type 
$? 
Rating 

Chord (of a circle)  Math Ope...

Chords (Geometry) 
Java Applet 
Tool 

[0]

An interactive applet and associated web page that demonstrate a chord of a circle.
The applet shows a circle and two draggable points on its periphery, with the chord drawn between them.
A c...
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Circle Graph

Circle graphs (Math 4)+ 
Java Applet 
Tool 

[0]

This activity allows the user to graph data on a circle graph. Students can use predefined data sets or enter their own data.
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Graphing the Equation of a Cir...

Circles (Algebra II)+ 
Flash 
Support Material 

[0]

This minilesson explains the basics of a circle such as radius, center, etc., as well as how to identify the key elements and graph the circles.
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Matching Equations to Descript...

Circles (Algebra II)+ 
JavaScript 
Tool 

[0]

Match each of the equations with the description of the graph created by the equation (hyperbola, parabola, circle, ellipse, line, and other).
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Determining the Uniqueness of ...

Circles (Geometry) 
Sketchpad 
Activity 

[0]

Are there a certain number of arbitrary points such that there exists a unique circle through them? To explore and conjecture an answer to this question, students will construct circles passing throug...
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Kissing Circles

Circles (Geometry)+ 
Sketchpad 
Activity 

[0]

This guided exploration, using Geometer's Sketchpad, examines the properties of tangent circles ("osculating" or kissing circles).
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A Japanese Temple Problem

Circles (Geometry)+ 
Sketchpad 
Activity 

[0]

In this guided Geometer's Sketchpad exploration, students use their knowledge of tangent circles to discover a relationship between the radii of three circles which are mutually tangent to each other ...
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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 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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Paper Cup Mathematics

Circles (Geometry)+ 
Sketchpad 
Lesson Plan 

[0]

Imagine a discarded paper cup rolling on its side of a flat surface. What geometric shape does the path of the cup form?
Students investigate this question and begin the activity by experimenting wit...
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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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Circles: Definitions and Formu...

Circles (Geometry)+ 
JavaScript 
Support Material 

[0]

The user reviews circles, terms related to circles, and formulas and equations associated with circles.
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Hypotrochoid

Circles (Geometry)+ 
Java Applet 
Support Material 

[0]

This Math Images page catalogs the hypotrochoid, along with a basic description, mathematical explanations, related links, and references.
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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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Real World Applications  Area...

Circles (Geometry)+ 
Flash 
Support Material 

[0]

This minilesson will help you apply your knowledge of area, perimeter, and volume to realworld problems.
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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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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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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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Inscribing a Regular Polygon i...

Circles (Geometry) 
Java Applet 
Tool 

[0]

(Under development) Increase the number of sides of a regular polygon inscribed in a circle.
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CenterRadius Form

Circles (Geometry) 
Sketchpad 
Tool 

[0]

This is a downloadable Geometer's Sketchpad file that illustrates the source of the centerradius area of a circle formula. Scroll halfway down this page in order to find the link to download this fil...
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Problem of 2 Circles #1

Circles (Geometry) 
Java Applet 
Tool 

[0]

An applet is provided to help you visualize the problem involving 2 circles and at inscribed triangle.
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Problem of 2 Circles #2

Circles (Geometry) 
Java Applet 
Tool 

[0]

An applet is provided to help you visualize the problem involving 2 circles and 2 corresponding chords.
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Problem of 2 Circles #3

Circles (Geometry) 
Java Applet 
Tool 

[0]

An applet is provided to help you visualize the problem involving 2 circles and 2 corresponding chords.
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Problem of 2 Circles #4

Circles (Geometry) 
Java Applet 
Tool 

[0]

An applet is provided to help you visualize the problem involving 2 circles and a triangle on those circles.
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Euclid's Elements, Book 3, Pro...

Circles (Geometry) 
Java Applet 
Tool 

[0]

Euclid's proposition states that two circles that touch do not share the same center. The guide then examines the structure of the proposition. The To reset the applet, press "r" while your cursor is...
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