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Topic (Course) 
Technology 
Type 
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Simson Line of a Triangle

Centers of triangles (Geometry) 
Java Applet 
Tool 

[1]

Use this applet to discover how to construct the Simson line of a triangle.
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Special Triangles

Triangles (Geometry) 
Java Applet 
Tool 

[0]

Provides an applet that demonstrates how to construct triangle given the lengths of the sides.
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Sum of Three Segments within a...

Equilateral (Geometry) 
Java Applet 
Tool 

[0]

An applet is provided to help you visualize a problem dealing with the sum of three segments within an equilateral triangle.
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The Altitude Theorem for Equil...

Equilateral (Geometry)+ 
Java Applet 
Tool 

[0]

Intrigue students with a surprising property of equilateral triangles, stimulate their curiosity to wonder why the property is true, then lead them to understand how the property can be proven in an u...
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The Angles in a Triangle

Triangles (Geometry) 
Java Applet 
Tool 

[0]

This applet has you discover an important properties about the sum of the angles in a triangle.
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The Area of a Triangle

Triangles (Geometry) 
Java Applet 
Tool 

[0]

This applet demonstrates the source of the area formula for the triangle.
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The Incenter of a Triangle  M...

Centers of triangles (Geometry) 
Java Applet 
Tool 

[0]

A web page and interactive applet demonstrating the concept of the incenter of a triangle.
The applet shows a triangle where the user can drag the vertices around. The incenter and the a...
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The Law of Cosines 1

Law of cosines (Geometry) 
Java Applet 
Tool 

[0]

This applet illustrates the law of cosines. Improved version of "Law of Cosines 2" applet. It allows students to prove the Law of Cosines using a proof similar to Euclid's proof for the Pythagorean ...
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The Law of Cosines 2

Law of cosines (Geometry) 
Java Applet 
Tool 

[0]

This applet illustrates the law of cosines.
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The Law of Sines

Law of sines (Geometry) 
Java Applet 
Tool 

[0]

This applet illustrates the law of sines.
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The Law of Sines

Law of sines (Geometry) 
Java Applet 
Tool 

[0]

This applet walks the student through an interactive, geometric proof of the Law of Sines.
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The Pythagorean Theorem

Law of sines (Geometry) 
Java Applet 
Tool 

[0]

The tool has a right triangle with the measures of the sides given below. In addition, there is an activity that leads the user to discovering the Pythagorean Theorem.
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The Sum of Three Angles of a T...

Triangles (Geometry) 
Java Applet 
Tool 

[0]

This applet demonstrates a property of the sum of the three angles of a triangle. In order to get the point, be sure to drag the triangle over so that the left corner of the new triangle touches the t...
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The Triangle  Math Open Refer...

Triangles (Geometry) 
Java Applet 
Tool 

[0]

An interactive applet and associated web page that introduce the concept of a triangle.
The applet shows a triangle where the user can drag the vertices to reshape it. As it is being dragged a b...
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The Triangles of a Polygon  M...

Triangles (Geometry) 
Java Applet 
Tool 

[0]

An interactive applet and associated web page that illustrate the triangles that can be drawn inside a polygon. The applet has
a pentagon with the triangles drawn. The user can change the number...
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Triangle Circumcenter  Math O...

Centers of triangles (Geometry) 
Java Applet 
Tool 

[0]

The applet shows a triangle which the user can resize by dragging any of its vertices.
It shows the three perpendicular bisectors of the sides and the point where they intersect  the circumc...
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Triangle Classification

Triangles (Geometry)+ 
Java Applet 
Tool 

[0]

An interactive Java Illustration for classification of triangles. The types displayed are scalene, acute, obtuse, right, isosceles, and equilateral.
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Triangle Classification Game

Isosceles (Geometry)+ 
Java Applet 
Tool 

[1]

In this activity the interactivity attempts to train the user in the classification of triangles with respect to sides and internal angles. The user should move the vertices of a triangle on a square ...
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Triangle Explorer

Triangles (Geometry) 
Java Applet 
Tool 

[0]

This applet allows users to study the nature of triangles and their area.
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Triangle Inequality  Math Ope...

Triangles (Geometry) 
Java Applet 
Tool 

[0]

An interactive applet and associated web page that demonstrate the concept of triangle inequality.
The applet shows a triangle where the vertices can be dragged to reshape the triangle
It shows...
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Triangle similarity test  AAA...

Triangles (Geometry) 
Java Applet 
Tool 

[0]

An interactive applet and associated web page showing how the AAA similarity test works.
Two similar triangles are shown that can be resized by dragging. The other triangle adjusts to remain...
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Triangle similarity test  SAS...

Triangles (Geometry) 
Java Applet 
Tool 

[0]

An interactive applet and associated web page showing how the SAS similarity test works.
Two similar triangles are shown that can be resized by dragging. The other triangle adjusts to remain...
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Triangle similarity test  SSS...

Triangles (Geometry) 
Java Applet 
Tool 

[0]

An interactive applet and associated web page showing how the SSS similarity test works.
Two similar triangles are shown that can be resized by dragging. The other triangle adjusts to remain...
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Types of Triangles

Isosceles (Geometry)+ 
Java Applet 
Tool 

[4]

This JavaSketchpad applet accompanies the tPoW, Types of Triangles. Students are able to drag and manipulate four triangles and by noticing what happens they classify the triangles as either scalene, ...
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Types of Triangles (Acute, Obt...

Triangles (Geometry)+ 
Java Applet 
Tool 

[0]

An interactive applet and associated web page that demonstrate the three types of triangle: acute, obtuse and right.
The applet shows a triangle that is initially acute (all angles less t...
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