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Technology 
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Describing Reflections

Reflections (Math 6)+ 
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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Reflections Across Two Mirror ...

Reflections (Math 6)+ 
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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Translations, Reflections, and...

Reflections (Math 7)+ 
Java Applet 
Lesson Plan 

[0]

An introduction to transformations.
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Transformations  Reflection

Reflections (Math 7) 
Java Applet 
Tool 

[0]

Dynamically interact with and see the result of a reflection transformation.
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Perimeter of a Polygon (Geomet...

Regular polygons (Geometry) 
Flash 
Support Material 

[0]

This minilesson explains how to find the perimeter of polygons.
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Areas of Polygons and Circles ...

Regular polygons (Geometry) 
Flash 
Support Material 

[0]

This minilesson explains basic concepts about the area of polygons.
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Area of a Parallelogram (Geome...

Regular polygons (Geometry) 
Flash 
Support Material 

[0]

This mini lesson explains the formula used to calculate the area of a parallelogram.
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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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Transformation of a Pentagon

Regular polygons (Geometry)+ 
Java Applet 
Tool 

[0]

This applet demonstrates conservation of area throughout transformations of a pentagon.
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Dividing a Square

Regular polygons (Geometry) 
Java Applet 
Tool 

[0]

This applet demonstrates the problem with the way that the square is rearranged so that the area is changed by the manipulation.
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Euclid's Elements, Book 4, Pro...

Regular polygons (Geometry)+ 
Java Applet 
Tool 

[0]

Euclid's proposition shows how to inscribe an equilateral and equiangular pentagon within a given circle. The guide then examines the structure of the proposition. The To reset the applet, press "r"...
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Euclid's Elements, Book 4, Pro...

Regular polygons (Geometry)+ 
Java Applet 
Tool 

[0]

Euclid's proposition shows how to circumscribe an equilateral and equiangular pentagon about a given circle. The guide then examines the structure of the proposition. The To reset the applet, press ...
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Euclid's Elements, Book 4, Pro...

Regular polygons (Geometry)+ 
Java Applet 
Tool 

[0]

Euclid's proposition shows how to inscribe a circle within a given equilateral and equiangular pentagon. The guide then examines the structure of the proposition. The To reset the applet, press "r" ...
More: lessons, discussions, ratings, reviews,...

Euclid's Elements, Book 4, Pro...

Regular polygons (Geometry)+ 
Java Applet 
Tool 

[0]

Euclid's proposition shows how to circumscribe a circle about a given equilateral and equiangular pentagon. The guide then examines the structure of the proposition. The To reset the applet, press "...
More: lessons, discussions, ratings, reviews,...

Euclid's Elements, Book 4, Pro...

Regular polygons (Geometry)+ 
Java Applet 
Tool 

[0]

Euclid's proposition shows how to inscribe an equilateral and equiangular hexagon within a given circle. The guide then examines the structure of the proposition. The To reset the applet, press "r" ...
More: lessons, discussions, ratings, reviews,...

Euclid's Elements, Book 4, Pro...

Regular polygons (Geometry)+ 
Java Applet 
Tool 

[0]

Euclid's proposition shows how to inscribe an equilateral and equiangular 15angle figure within a given circle. The guide then examines the structure of the proposition. The To reset the applet, pr...
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Constructing a hexagon inscrib...

Regular polygons (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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Demos for Related Rates Proble...

Related rates problems (Calculus) 
Computer 
Support Material 

[0]

This page includes a description of solution techniques for (timedependent) related rates problems, and a gallery of ten "movies" to illustrate different problems.
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Related Rates

Related rates problems (Calculus) 
Java Applet 
Tool 

[0]

Compare a runner's position and the rate of change of the length of his shadow.
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Linear Patterns with the Linea...

Represent (Math 7)+ 
Java Applet 
Activity 

[0]

How does changing the slope of a line affect the equation of that line? How might changing a part of an equation cause the related line to move? Explore these challenges using the Linear Transformer t...
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Linear Transformer

Represent (Math 7)+ 
Java Applet 
Tool 

[0]

Highlight the meaning of each component of a linear function's symbolic expression with this tool that links symbolic and graphic representations of translating (dragging) a line vertically or horizon...
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In the Dark with an Elephant T...

Representations (Math 6)+ 
Java Applet 
Lesson Plan 

[0]

Links to Standards, activities, lessons, Ask Dr. Math archives, vocabulary, other resources.
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In the Dark with an Elephant

Representations (Math 6)+ 
Java Applet 
Tool 

[0]

Students are asked to investigate how the appearance of a graph changes, based on the scale of the graph and the region being viewed.
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Diagonals of a Rhombus

Rhombus (Geometry) 
Sketchpad 
Activity 

[0]

A guided exploration, using Geometer's Sketchpad, of the construction and diagonals of a rhombus.
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Area of a Rhombus  Math Open ...

Rhombus (Geometry) 
Java Applet 
Tool 

[0]

A web page and interactive applet showing the ways to calculate the area of a rhombus.The user can drag the vertices of the rhombus and the other points change automatically to ensure it remains a ...
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