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Topic (Course) 
Technology 
Type 
$? 
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Perpendicular Slopes

Perpendicular (Geometry) 
TINspire 
Activity 

[0]

In this activity, students investigate the “negative reciprocal” relationship between the slopes of perpendicular lines. The final phase of the activity is appropriate for more advanced students as th...
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IGD: Dropping a Perpendicular ...

Perpendicular (Geometry) 
Computer 
Tool 

[0]

Constructing a line perpendicular to a given line and through a point not on the line is one of the most important constructions in geometry. This process is known as dropping a perpendicular, because...
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Perpendicular lines in coordin...

Perpendicular (Geometry) 
Flash 
Tool 

[0]

An interactive applet and associated web page that show how to determine of one line is perpendicular to another in coordinate geometry.
The principle used is that if two lines a re perpendicula...
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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...
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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.
...
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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.
...
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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...
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Definition of Perpendicular Li...

Perpendicular (Geometry) 
Java Applet 
Tool 

[1]

Defines and illustrates perpendicular lines using an "interactive geometry dictionary" format.
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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...
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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 not on the line. The guide then examines the structure of the proposition. To reset the apple...
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Eyeballing Game

Perpendicular (Geometry) 
Java Applet 
Tool 

[0]

The user is given 7 tasks. Each involves using estimation to achieve a geometric task. Two samples are: moving a ray so that it is an angle bisector, and moving a vertex of a quadrilateral so that it ...
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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.
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Perpendicular lines  Math Ope...

Perpendicular (Geometry) 
Java Applet 
Tool 

[0]

An interactive applet and associated web page that demonstrate the concept of 'perpendicular'.
The applet presents two intersecting line segments, one initially at right angles to the other.
...
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What Is Meant By Perpendicular...

Perpendicular (Geometry) 
Java Applet 
Tool 

[0]

This applet illustrates what is meant by perpendicular.
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Pairs of Lines

Perpendicular (Geometry) 
JavaScript 
Tool 

[0]

The user learns about the four different pairs of lines: parallel lines, perpendicular lines, intersecting lines, and skew lines. After viewing examples of each, users can interactively test their un...
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GeoCon HD

Perpendicular (Geometry) 
iPad 
Tool 
$ 
[1]

GeoCon HD is designed to be used by students, teachers and math enthusiasts studying plane geometry. With GeoCon HD various constructions can be created with the touch of a finger. Resolve constructio...
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GeoCon

Perpendicular (Geometry) 
iPhone 
Tool 
$ 
[1]

GeoCon is designed to be used by students, teachers and math enthusiasts studying plane geometry. With GeoCon various constructions can be created with the touch of a finger. Resolve construction task...
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