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Topic (Course) 
Technology 
Type 
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Euclid's Elements, Book III, P...

Circles (Geometry) 
Java Applet 
Tool 

[0]

Euclid's proposition states that two intersecting circles that cut each other do not share the same center. The guide then examines the structure of the proposition. The To reset the applet, press "...
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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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Circles

Circles (Geometry) 
JavaScript 
Tool 

[0]

The user reviews circles and the important terms and properties related to circles. After viewing examples, users can interactively practice matching the term with the correct part of the circle.
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Annulus, definition and proper...

Circles (Geometry) 
Java Applet 
Tool 

[0]

A web page and interactive applet show that an annulus is a flat (planar) ring, and can be thought of as a disk with a hole punched out of it.
Applet can be enlarged to full screen size f...
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Area of an Annulus  Math Open...

Circles (Geometry) 
Java Applet 
Tool 

[0]

A web page and interactive applet show how to compute the area of an annulus. Text on the page explains that the area is the overall area minus the area of the circular 'hole' in the center. For t...
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Thales Theorem  Math Open Ref...

Circles (Geometry) 
Java Applet 
Tool 

[0]

A web page and interactive applet illustrating Thales' Theorem
(the diameter of a circle always subtends a right angle to any point on the circumference).
The applet shows a circle wher...
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Finding the Center of a Circle...

Circles (Geometry)+ 
Java Applet 
Tool 

[0]

An interactive applet and associated web page that provide stepbystep instructions on how to find the center of a circle
using only a compass and straightedge.
The method used involves constru...
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Sector of a circle  Math Open...

Circles (Geometry) 
Java Applet 
Tool 

[0]

An interactive applet and associated web page that demonstrate a sector  a pie shaped part of a circle.
The applet shows a sector against the background of the circle of which it is part.
The ...
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Area of a Circle  Math Open R...

Circles (Geometry)+ 
Java Applet 
Tool 

[0]

An interactive applet and associated web page that demonstrate the area of a circle.
A circle is shown with a point on the circumference that can be dragged to resize the circle.
As the circle i...
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Area of a Segment of a Circle ...

Circles (Geometry)+ 
Java Applet 
Tool 

[0]

An interactive applet and associated web page that demonstrate the area of a segment of a circle  a part of a circle cut off by a chord.
The applet shows a circle and a segment of that circle, ...
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Concentric Circles  Math Open...

Circles (Geometry) 
Java Applet 
Tool 

[0]

An interactive applet and associated web page that demonstrate the concept of concentricity.
The applet shows two resizeable concentric circles and the common center point. As they are dragged to ...
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Find the center of a circle. M...

Circles (Geometry)+ 
Java Applet 
Tool 

[0]

An interactive applet and associated web page that provide stepbystep instructions on how to find the center of a circle
using any rightangled object, such as a piece of paper.
The method use...
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Draw ellipse with pins and str...

Circles (Geometry)+ 
Java Applet 
Tool 

[0]

An interactive applet and associated web page that provide stepbystep instructions on how to draw an ellipse
using two pins and some string. Not strictly a Euclidean construction, but instruct...
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Circle definition  Math Open ...

Circles (Geometry) 
Java Applet 
Tool 

[0]

An interactive applet and associated web page defining a circle.
The applet shows a circle where the user can drag the center and a point on the circle. The radius line supports the definition
...
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Inscribed Angle of a Circle  ...

Circles (Geometry)+ 
Java Applet 
Tool 

[0]

An interactive applet and associated web page that demonstrate the inscribed angle of a circlethe angle subtended at the periphery by two points on the circle.
The applet presents a...
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Math Images Tool: Hypotrochoid

Circles (Geometry)+ 
Java Applet 
Tool 

[0]

There are three subgroups within the Hypotrochoid family. The point P can be in three different general locations in relation to the rolling circle: inside, outside, or on the edge. The user of this a...
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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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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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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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Euclid's Elements, Book 3, Pro...

Circumference (Geometry)+ 
Java Applet 
Tool 

[0]

Euclid's proposition shows that when two equal circles are cut into two corresponding equal sections, then the chords cutting the circles' circumferences are equal. The guide then examines the struct...
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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  Ma...

Circumference (Geometry)+ 
Java Applet 
Tool 

[0]

An interactive applet and associated web page that demonstrate the circumference of a circle.
The applet shows a circle with a radius line.
The radius endpoints are draggable and the circle i...
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Journal: Describe the Shape

Classify geometric objects (Kindergarten)+ 
Java Applet 
Story 

[0]

Varnelle describes how the children responded as she worked with them on the "Describe the Shape" activity.
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Polygons

Classify geometric objects (Math 3)+ 
Java Applet 
Lesson Plan 

[0]

This lesson has online resources that teach basic concepts about polygons.
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Venn Diagram Lesson

Classify geometric objects (Math 3)+ 
Calculator 
Lesson Plan 

[0]

Students learn how to classify items and numbers on Venn Diagrams using computer applets.
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