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Properties of Parallel Lines

Alternate exterior angles (Geometry) 
Sketchpad 
Activity 

[2]

Students discover relationships among the angles formed when parallel lines are intersected by a transversal. The link to the activity itself is to a zip file that contains a pdf file of the activi...
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Angles and Parallel Lines (Ams...

Alternate exterior angles (Geometry) 
Flash 
Support Material 

[0]

This minilesson explains parallel lines and interior, exterior, alternate interior and exterior, and corresponding angles.
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Parallel Lines Cut by a Transv...

Alternate exterior angles (Geometry) 
Flash 
Tool 

[0]

This movie has sound and graphics. It shows the relationship of the angles formed by a pair of parallel lines and a transversal. Also includes an application problem. Takes 5 minutes to view.
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Alternate Exterior Angles  Ma...

Alternate exterior angles (Geometry) 
Java Applet 
Tool 

[0]

An interactive applet and associated web page that demonstrate the alternate
exterior angles that are formed where a transversal crosses two lines. The applets shows the
two possible pairs of ...
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Euclid's Elements, Book I, Pro...

Alternate exterior angles (Geometry) 
Java Applet 
Tool 

[0]

Euclid's proposition states that when a straight line intersects two other lines and the resulting alternate angles are equal, then the two lines crossed are parallel. The guide then examines the str...
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Euclid's Elements, Book I, Pro...

Alternate exterior angles (Geometry) 
Java Applet 
Tool 

[0]

Euclid's proposition states that when a straight line intersects two other lines and the exterior angle is equal to the interior and opposite angles, then the two lines crossed are parallel. Also if ...
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Euclid's Elements, Book I, Pro...

Alternate exterior angles (Geometry) 
Java Applet 
Tool 

[0]

Euclid's proposition states that when a transversal crosses two parallel lines it makes the alternate angles equal, the alternate equal to the opposite and interior angle, and the sum of the interior ...
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Angles and Intersecting Lines

Alternate exterior angles (Geometry) 
JavaScript 
Tool 

[0]

The user learns about angles formed when a transversal cuts two lines, either parallel or intersecting. After viewing examples of the angles formed, users can interactively practice naming the angles...
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