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Resource Name 
Topic (Course) 
Technology 
Type 
$? 
Rating 

Construct a 45° angle with ...

Angles (Geometry) 
Java Applet 
Tool 

[2]

An interactive applet and associated web page that show how to construct a 45° angle with a compass and straightedge.
The animation can be singlestepped or run as a continuous movie.
...
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Angles and Angle Measurement

Angles (Geometry) 
Computer 
Support Material 

[1]

Defines angles and angle measurement through rotation.
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XP Math: Helicopter Shootdown ...

Angles (Geometry) 
Flash 
Tool 

[1]

In this game, students set the angle at which to fire, attempting to get "close enough" to the helicopter to shoot it down.
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Exterior Angles of a Transvers...

Exterior (Geometry) 
Java Applet 
Tool 

[1]

An interactive applet and associated web page that demonstrate the
exterior angles that are formed where a transversal crosses two lines. The applet shows the
two possible pairs of exterior a...
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GeoCon HD

Exterior (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

Exterior (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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Angles

Angles (Geometry) 
Java Applet 
Lesson Plan 

[1]

The following lesson is designed to introduce students to acute, obtuse, and right angles. It is also designed to introduce students to vertical angles, adjacent angles, alternate interior angles and ...
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Types of Angles

Angles (Geometry) 
Java Applet 
Tool 

[1]

Gives definitions of acute, obtuse, and right angles along with an applet that demonstrates the different types of angles. In addition there is an applet that tests understanding of acute vs. obtuse ...
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Angle Bisector

Bisectors (Geometry) 
Java Applet 
Tool 

[1]

This applet illustrates the process of constructing an angle bisector. From Illuminations' IGD: Interactive Geometry Dictionary.
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Euclid's Elements, Book I, Def...

Obtuse (Geometry)+ 
Java Applet 
Tool 

[1]

Gives Euclid's original definitions of obtuse and acute angles and then examines the definitions' validity and durability. To reset the applet, press "r" while your cursor is over the diagram.
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Geoboard  Circular

Angles (Geometry) 
Java Applet 
Tool 

[1]

Use circular geoboard to illustrate angles and degrees.
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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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Interior Angles of a Polygon ...

Angles (Geometry) 
Java Applet 
Tool 

[1]

An interactive applet and associated web page that demonstrate that the interior angles of a polygon always add to
a number related only to the number of sides.
The applet shows a polygo...
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Radians

Angles (Geometry) 
Flash 
Tool 

[2]

Flashbased introduction to converting between degrees and radians. College Cram charges access fees by the month or by the semester for most resources. To get a preview of their tools, see their ...
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Exploring Angle Sums Using Hal...

Interior (Geometry) 
Java Applet 
Tool 

[1]

In this investigation, the user can interactively construct a figure that illustrates the sum of the interior angles in a triangle, quadrilateral or a pentagon.
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Using a Protractor, animated d...

Angles (Geometry) 
Java Applet 
Tool 

[1]

An interactive applet and associated web page that provide stepbystep animated instructions on how to
measure angles using a protractor. Specifically, the applet uses a protractor to measure t...
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PoolARama

Angles (Geometry) 
Java Applet 
Activity 

[0]

Place your bets on whether the pool ball will get into the pocket after choosing how to make your move.
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Construct a 90 deg angle with ...

Right (Geometry) 
Java Applet 
Activity 

[0]

An interactive applet and associated web page that show how to construct a 90° right angle with a compass and straightedge.
The animation can be singlestepped or run as a continuous movie.
<...
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Exterior Angles in a Polygon

Exterior (Geometry) 
Sketchpad 
Activity 

[0]

Students construct a pentagon with its exterior angles, measure the angles and find the sum. They then dilate the pentagon to look at the problem, and understand their result, in a new way. The lin...
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Geometry Activities for Middle...

Angles (Geometry) 
Sketchpad 
Activity 
$ 
[0]

These activities provide students with the opportunity to explore geometric concepts such as symmetry, transformations, and even fractal geometry in a way no other teaching tool can. The dynamic ca...
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Angle Bisectors in a Triangle

Bisectors (Geometry) 
Sketchpad 
Activity 

[0]

A guided exploration of the angle bisectors of a triangle, and the point at which they intersect, using Geometer's Sketchpad.
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A Minimum Perimeter Inscribed ...

Bisectors (Geometry) 
Sketchpad 
Activity 

[0]

A guided exploration about triangle inscribed within triangles, and the conditions under which their perimeter is at a minimum, using Geometer's Sketchpad.
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A Continuation of Minimum Peri...

Bisectors (Geometry) 
Sketchpad 
Activity 

[0]

A further guided exploration of triangles inscribed within triangles, using Geometer's Sketchpad.
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Simple Properties of Angle Bis...

Bisectors (Geometry) 
Sketchpad 
Activity 

[0]

A guided exploration using Geometer's Sketchpad of some properties of angle bisectors in a triangle.
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The Art Gallery Problem

Angles (Geometry) 
TINspire 
Activity 

[0]

The question of where patrons should stand to enjoy the best view of a painting is one that art gallery curators must consider on a regular basis. For this activity, we will consider a painting that i...
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