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Topic (Course) 
Technology 
Type 
$? 
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A Plethora of Polyhedra

Transformations and symmetry (Geometry) 
Java Applet 
Tool 

[4]

This is a free JAVA applet that helps users to study spatial geometry in a dynamic and interactive way. Using it, the user can rotate, zoom out, zoom in and translate a plethora of polyhedra. Moreover...
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Animated Helicopter

Transformations and symmetry (Geometry) 
Computer 
Activity 

[0]

An Logoanimated helicopter can be used to investigate the concepts of variables, and of reflections and y as a function of x on the coordinate grid. The first Logo animation of a helicopter flying ba...
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Area and perimeter of a rectan...

Reflection (Geometry) 
Flash 
Tool 

[1]

A web page and interactive (Flash) applet demonstrating the reflection transformation. Drag the vertices of a triangle and reposition the line of reflection. The reflected image of the triangl...
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Cabri 3D

Transformations and symmetry (Geometry) 
Cabri 
Tool 
$ 
[0]

Cabri 3D is interactive solid geometry software based on 3rd generation Cabri technology. It enables users to build and manipulate figures in 3D. It is entirely designed and developed by Cabrilog, and...
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Color in Tessellations Dialogu...

Tessellations (Geometry) 
Java Applet 
Support Material 

[0]

Explains the effect that color has on the patterns we see in tessellations.
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Composing Reflections

Reflection (Geometry) 
Java Applet 
Tool 

[0]

Users can examine the result of reflecting a shape successively through two different lines.
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Composing Transformations

Reflection (Geometry)+ 
Java Applet 
Tool 

[1]

The users are challenged to compose equivalent transformations in two different ways.
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Composition of Transformations...

Transformations and symmetry (Geometry)+ 
Sketchpad 
Activity 

[2]

This "lab" contains seven "experiments" in which students perform different geometric transformations on an object to determine whether, or under what conditions, the transformations commute.
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Congruent Triangles

Transformations and symmetry (Geometry) 
Java Applet 
Tool 

[1]

This page provides three applets that you manipulate in order to discover rotation, translation, and reflection. Then below are descriptions of sideangleside, anglesideangle, and sidesideside (...
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Coordinate Pictures

Transformations and symmetry (Geometry) 
Computer 
Lesson Plan 

[0]

This activity is an enhancement to an age old activity of students drawing a "dottodot" picture using coordinates on a coordinate plane. In this case, however, students will design a picture of thei...
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Coordinates and Similar Figure...

Transformations and symmetry (Geometry) 
Computer 
Support Material 

[0]

Provides definitions and illustrations on coordinates and similar figures.
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Describing Reflections

Reflection (Geometry) 
Java Applet 
Tool 

[0]

Interacting with the JavaSketchpad applets helps the user understand how reflections work and what happens when two or more reflections are applied one after the other.
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Describing Rotations

Rotation (Geometry) 
Java Applet 
Tool 

[0]

Students will think about how to describe rotations of a figure and then have the opportunity to investigate the effect of rotations through different angles and on different shapes.
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Dilation transformation  Math...

Dilation (Geometry) 
Computer 
Activity 

[0]

An interactive applet and associated web page that demonstrate the dilation transformation.
The applet shows a rectangle and its dilated image. The user can control the scale factor with a sl...
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Dilations in the Plane

Dilation (Geometry) 
Cabri Jr. 
Activity 

[0]

A dilation is a transformation that produces a figure with a different size from that of the original figure. In this activity, students explore the properties of dilations and the relationships betwe...
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Dueling Pinwheels

Reflection (Geometry)+ 
Sketchpad 
Activity 

[0]

This contains construction directions for rotations, translation, and reflection, with questions to explore and a demonstration sketch to download at an introductory Sketchpad level.
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Enlargement of Figures

Dilation (Geometry) 
Java Applet 
Tool 

[1]

This applet demonstrates how transformation along lines through an origin is used to enlarge a figure.
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Exploring and Creating Tessell...

Tessellations (Geometry) 
Sketchpad 
Activity 

[0]

This activity has students explore and construct several different types of tessellations. The first part of the activity uses only regular polygons to create pure and semipure tessellations; therefo...
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Exploring the Definition of Re...

Reflection (Geometry) 
Computer 
Lesson Plan 

[1]

This lesson provides directions for teaching the definition of reflection using Geometer's Sketchpad.
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Finding What Doesn't Change

Rotation (Geometry) 
Java Applet 
Tool 

[0]

Students will predict the effect of a rotation through a given angle and even the effect of two or more rotations performed one after the other and find angles that leave a figure unchanged.
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Floor Tiles

Tessellations (Geometry) 
Java Applet 
Tool 

[1]

This activity allows the user to create a figure that can be tessellated.
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Four Types of Symmetry in the ...

Transformations and symmetry (Geometry) 
Java Applet 
Support Material 

[0]

An overview of rotation, translation, reflection, and glide reflection including diagrams illustrating the four symmetries and questions that could be used with students.
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Frieze Patterns

Transformations and symmetry (Geometry) 
Sketchpad 
Tool 

[0]

This is a starter sketch for use with the activity, "Constructing the Seven Frieze Patterns."
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Funhouse Mirrors

Reflection (Geometry) 
Sketchpad 
Tool 

[0]

A Geometer's Sketchpad tool for constructing distorted images that can be viewed undistorted with a cylindrical mirror. The file contains tabbed pages with several images, a grid for students to draw...
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Geoboard

Transformations and symmetry (Geometry) 
Java Applet 
Tool 

[0]

Use geoboard to illustrate area, perimeter, and rational number concepts.
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