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Technology 
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Quadrilaterals in Quadrilatera...

Quadrilaterals (Geometry) 
Java Applet 
Tool 

[0]

Java Sketchpad applet that illustrates the remarkable fact that the midpoints of any quadrilateral form a parallelogram.
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Radius of a Polygon  Math Ope...

Polygons (Geometry)+ 
Java Applet 
Tool 

[0]

An interactive applet and associated web page that define and describe the radius of a regular polygon.
The applet has a polygon where the user can change the umber of sides and alter the radiu...
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Radius of a circle  Math Open...

Radius (Geometry) 
Java Applet 
Tool 

[0]

An interactive applet and associated web page that demonstrate the radius of a circle.
The applet shows a circle with a radius line.
The radius endpoints are draggable and the figure changes ...
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Radius of an Arc  Math Open R...

Radius (Geometry)+ 
Java Applet 
Tool 

[0]

An interactive applet and associated web page that describe the radius of an arc and how to derive it from the width and height of the
segment defined by that arc. A practical use is described fo...
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Ray definition  Math Open Re...

Line (Geometry) 
Java Applet 
Tool 

[0]

An interactive applet and associated web page that demonstrate the definition of a ray. The applet presents one point and a
line that goes from that point off to infinity.
As the point is dragg...
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Rectangle Properties

Rectangle (Geometry) 
Java Applet 
Tool 

[0]

This applet examines the relationships between length, width, area, and perimeter of rectangles.
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Rectangle, definition and pro...

Rectangle (Geometry) 
Java Applet 
Tool 

[0]

A web page and interactive applet showing the definition and properties of a rectangle.
The applet shows a rectangle where the user can drag any vertex. The other points then move in such...
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Reflections Across Two Mirror ...

Reflection (Geometry) 
Java Applet 
Tool 

[0]

Users will learn what happens when a design is reflected twice across two different mirror lines with this interactive activity.
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Regular Polygons  Math Open R...

Polygons (Geometry) 
Java Applet 
Tool 

[0]

An interactive applet and associated web page that demonstrate regular polygons. The applet presents a regular hexagon initially. The
user can drag any vertex, which causes all the others to mo...
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Regular m/nPolygons

Regular polygons (Geometry) 
Java Applet 
Tool 

[0]

This page provides instructions for constructing a regular m/npolygon and an applet that you must use in order to complete the activities given at the bottom of the page
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Relating Rotations to Symmetry

Transformations and symmetry (Geometry) 
Java Applet 
Tool 

[0]

Students will investigate the relationship between rotations and the symmetry they recognize in a figure or a design in this activity.
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Rhombus, definition and prope...

Rhombus (Geometry) 
Java Applet 
Tool 

[1]

A web page and interactive applet showing the definition and properties of a rhombus. The applet shows a rhombus where the user can drag any vertex. The other points then move in such a way that th...
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Right Angles

Right (Geometry)+ 
Java Applet 
Tool 

[0]

Provides an applet that demonstrates how to construct right angle using a straightedge and a compass.
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Rotating Houses

2D pictures of 3D solids (Geometry) 
Java Applet 
Tool 

[2]

Students are presented with a 3d figure created with blocks that can be rotated and flipped using a mouse. The figure must be rotated until it matches a 2d representation of one of the views. There ...
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Scalene Triangles  Math Open ...

Scalene (Geometry) 
Java Applet 
Tool 

[0]

An interactive applet and associated web page that demonstrate the properties of scalene triangles.
The applet presents a scalene triangle where any vertex can be dragged to reshape i...
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Secant to a Circle  Math Open...

Secants (Geometry) 
Java Applet 
Tool 

[0]

An interactive applet and associated web page that demonstrate a secant to a circle. (not trig).
The applet shows a circle and a secant line. The points where the secant cross the circle are bo...
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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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Segment of a Circle  Math Ope...

Diameter (Geometry)+ 
Java Applet 
Tool 

[0]

An interactive applet and associated web page that demonstrate 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, the ends of ...
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Semimajor and Semiminor axes...

General (Geometry) 
Java Applet 
Tool 

[0]

An interactive applet and associated web page that show the semimajor and semiminor axes of an ellipse.
The applet has an ellipse whose major and minor axis endpoints can be dragged.
As they...
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Shadow of a Square

Transformations and symmetry (Geometry) 
Java Applet 
Tool 

[0]

This applet has you creating figures based on shadows (or transformations) of the given square.
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Shape Sorter Tool

Angles (Geometry)+ 
Java Applet 
Tool 

[1]

Shapes have many different properties such as the lengths of their sides, measures of interior angles, and symmetry. This tool allows the user to use a Venn diagram model to sort shapes based on their...
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Side Length and Area of Simila...

Similarity (Geometry)+ 
Java Applet 
Tool 

[1]

The user can manipulate the side lengths of one of two similar rectangles and the scale factor to learn about how the side lengths, perimeters, and areas of the two rectangles are related.
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Side Length, Volume, and Surfa...

Similarity (Geometry)+ 
Java Applet 
Tool 

[0]

The user can manipulate the scale factor that links two threedimensional rectangular prisms and learn about the relationships among edge lengths, surface areas, and volumes.
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Side Length, Volume, and Surfa...

Perimeter, area, and volume (Geometry) 
Java Applet 
Tool 

[0]

The user can manipulate the scale factor that links two threedimensional rectangular prisms and learn about the relationships among edge lengths, surface areas, and volumes.
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Sides of a Regular Polygon  M...

Polygons (Geometry) 
Java Applet 
Tool 

[0]

An interactive applet and associated web page that illustrate the properties of the sides of a regular polygon.
The applet shows a regular hexagon where the user can drag any vertex and change t...
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