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Technology 
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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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Interior and Exterior Angles o...

Exterior (Geometry) 
Flash 
Support Material 

[0]

This minilesson explains the properties and relationship of angles of polygons in general and particularly of interior and exterior angles of polygons.
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Euclid's Elements, Book I, Pro...

Exterior (Geometry) 
Java Applet 
Tool 

[0]

Euclid's proposition shows that the exterior angle of an extended side of a triangle is greater than any of the interior angles of the triangle. The guide then examines the structure of the propositi...
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Explore Exterior Angles of a P...

Exterior (Geometry) 
Java Applet 
Tool 

[0]

Drag the points on this diagram of a pentagon, and examine what happens to the angle measures and sum of the exterior angles. Java Sketchpad activities, with points for students to observe.
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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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Exterior Angles of a Triangle ...

Exterior (Geometry) 
Java Applet 
Tool 

[0]

An interactive applet and associated web page that demonstrate the exterior angles of a triangle. The applet shows a triangle
where the user can drag any vertex to reshape it. The exterior angle...
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Interior / Exterior Angles of ...

Exterior (Geometry) 
Java Applet 
Tool 

[0]

An interactive applet and associated web page that demonstrate the relationship of the interior and exterior angles of a polygon.
The applet shows an irregular polygon where one vertex is draggabl...
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Sum of Exterior Angles of a Po...

Exterior (Geometry) 
Java Applet 
Tool 

[0]

Discover what is the sum of the exterior angles of a polygon through this applet.
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Angles and Intersecting Lines

Exterior (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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