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Technology 
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Bisecting a Line using Compass...

Perpendicular (Geometry)+ 
Java Applet 
Tool 

[1]

An interactive applet and associated web page that provide stepbystep instructions on how to bisect a line using only a compass and straightedge.
The animation can be run either continuously lik...
More: lessons, discussions, ratings, reviews,...

Construct a perpendicular at e...

Perpendicular (Geometry)+ 
Java Applet 
Tool 

[1]

An interactive applet and associated web page that provide stepbystep instructions on how to
construct a perpendicular at the endpoint of a ray using only a compass and straightedge.
...
More: lessons, discussions, ratings, reviews,...

Constructing a Perpendicular t...

Perpendicular (Geometry)+ 
Java Applet 
Tool 

[0]

An interactive applet and associated web page that provide stepbystep animated instructions on how to
construct a perpendicular to a given line through a given point off the line.
...
More: lessons, discussions, ratings, reviews,...

Constructing a Perpendicular t...

Perpendicular (Geometry)+ 
Java Applet 
Tool 

[0]

An interactive applet and associated web page that provide stepbystep animated instructions on how to
construct a perpendicular to a given line at a given point on the line.
The an...
More: lessons, discussions, ratings, reviews,...

Euclid's Elements, Book I, Def...

Perpendicular (Geometry) 
Java Applet 
Tool 

[0]

Gives Euclid's original definition of perpendicular lines and then examines the definition's validity and durability. To reset the applet, press "r" while your cursor is over the diagram.
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Euclid's Elements, Book I, Pro...

Perpendicular (Geometry) 
Java Applet 
Tool 

[0]

Euclid's proposition demonstrates how to draw a line perpendicular to a given line, through a given point on the line. The guide then examines the structure of the proposition. To reset the applet, p...
More: lessons, discussions, ratings, reviews,...

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

Perpendicular (Geometry) 
Java Applet 
Tool 

[0]

Euclid's proposition demonstrates how to draw a line perpendicular to a given line, through a given point not on the line. The guide then examines the structure of the proposition. To reset the apple...
More: lessons, discussions, ratings, reviews,...

Perpendicular Bisector of a Se...

Perpendicular (Geometry)+ 
Java Applet 
Tool 

[1]

Use this applet to find out how to construct the perpendicular bisector of a line segment. From Illuminations' IGD: Interactive Geometry Dictionary.
More: lessons, discussions, ratings, reviews,...

Determine If Two Lines are Per...

Perpendicular Lines (Algebra) 
Flash 
Support Material 

[0]

This minilesson explains how to determine if two lines are perpendicular by looking at their equations.
More: lessons, discussions, ratings, reviews,...

Find Equation of a Line Perpen...

Perpendicular Lines (Algebra) 
Flash 
Support Material 

[0]

This minilesson explains how to find the equation of a line perpendicular to a given line.
More: lessons, discussions, ratings, reviews,...

Constructing Parallel and Perp...

Perpendicular and parallel lines (Geometry)+ 
Flash 
Support Material 

[0]

This minilesson explains how to construct parallel and perpendicular lines, using earlier lessons about the basics of compass and straightedge construction.
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Identifying Special Angle Pair...

Perpendicular and parallel lines (Geometry) 
Flash 
Support Material 

[0]

This minilesson explains how to identify special angle pairs, i.e. angles formed when a transversal cuts (or intersects) parallel lines.
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Relationships Among Special An...

Perpendicular and parallel lines (Geometry) 
Flash 
Support Material 

[0]

This minilesson explains more about basic geometric figures and classifying angles according to their measures, and about more complex geometric relationships among them.
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Angles and Parallel Lines

Perpendicular and parallel lines (Geometry) 
Java Applet 
Tool 

[1]

Three applets that demonstrate the concepts of vertical angles, corresponding angles, alternate angles, transversal lines, and how parallel lines effect these relations.
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Horizontal Machine

Perpendicular and parallel lines (Geometry) 
Java Applet 
Tool 

[0]

Figure out how the motion of this horizontal machine is defined using the properties of the interlocked rotating planks.
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3D Object Viewer

Perspective (3D in 2D) (Math 6)+ 
Java Applet 
Tool 

[1]

Applet contains orthographic projections (static) and perspective drawings (dynamic) of 8 different objects; useful for building visualization skills. Toggle between "drawing" view and "3d model" vi...
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Building Houses

Perspective (3D in 2D) (Math 6)+ 
Java Applet 
Tool 

[9]

Provides a "building pad" for constructing block houses. Building pad is dynamic; top, front, and side views of constructed objects are shown.
More: lessons, discussions, ratings, reviews,...

Building Houses with Side View...

Perspective (3D in 2D) (Math 6)+ 
Java Applet 
Tool 

[22]

This provides a visualization challenge. Front, right, and top views, and the number of blocks used, are shown; user constructs a block figure (dynamic, perspective drawing) to match (10 different fi...
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Colouring Sides 1

Perspective (3D in 2D) (Math 6)+ 
Java Applet 
Tool 

[9]

This tool presents a 3d drawing along with four 2d views. Choose the one 2d figure that corresponds to the colored face on the 3d figure. These exercises in spatial visualization become more chall...
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Colouring Sides 2

Perspective (3D in 2D) (Math 6)+ 
Java Applet 
Tool 

[3]

Eight 3d objects are shown in perspective and orthographic views. Some faces in the orthographic views are colored; user colors appropriate faces in the perspective view. Twenty variations shown, w...
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Guess The View

Perspective (3D in 2D) (Math 6)+ 
Java Applet 
Tool 

[6]

Students are given a 3d view of an object, and then given a 2d view of the object. Students must choose which of 6 views is being displayed from a list including front view, right side view, left si...
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Rectangular Prism Volume

Perspective (3D in 2D) (Math 6)+ 
Java Applet 
Tool 

[1]

The classic "box folding problem." This applet demonstrates the calculation of the volume of a rectangular prism. What height gives the largest volume?
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Rotating Houses

Perspective (3D in 2D) (Math 6)+ 
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 ...
More: lessons, discussions, ratings, reviews,...

Three Dimensional Sketching

Perspective (3D in 2D) (Math 7)+ 
Computer 
Lesson Plan 

[0]

This lesson provides directions for teaching students how to make three dimensional sketches with Geometer's Sketchpad.
More: lessons, discussions, ratings, reviews,...

Plot Plans and Silhouettes

Perspective (3D in 2D) (Math 7)+ 
Java Applet 
Tool 

[0]

Visualization activity; given front and side views, devise a workable top view (with heights). Instructions and discussion built in.
More: lessons, discussions, ratings, reviews,...

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