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Topic (Course) 
Technology 
Type 
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Median of a Trapezoid  Math O...

Trapezoid (Geometry) 
Java Applet 
Tool 

[0]

An interactive applet and associated web page that demonstrate the median line of
a trapezoid (line linking midpoints of nonparallel sides).
The applet shows a trapezoid with all vertices drag...
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Perimeter of a trapezoid  Mat...

Trapezoid (Geometry)+ 
Java Applet 
Tool 

[0]

A web page and interactive applet show how to compute the perimeter of a trapezoid.
A trapezoid is shown that can be resized by dragging its vertices. As you drag, the perimeter is continuously...
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Trapezoid, definition and pro...

Trapezoid (Geometry) 
Java Applet 
Tool 

[0]

A web page and interactive applet showing the definition and properties of a trapezoid.
The applet shows a trapezoid where the user can drag any vertex. The other points then move in such...
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Centroid of a Triangle  Math...

Triangles (Geometry) 
Java Applet 
Tool 

[0]

A web page and interactive applet demonstrating the concept of the centroid of a triangle.
The applet shows a triangle where the user can drag the vertices around. The centroid and the m...
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Angles of a Triangle

Triangles (Geometry) 
Java Applet 
Tool 

[0]

Provides an applet that demonstrates how the three angles of a triangle add to 180 degrees. Another applet at the bottom gives stepbystep instructions on how to do this activity with a piece of pap...
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Area and perimeter of a triang...

Triangles (Geometry)+ 
Flash 
Tool 

[0]

An interactive applet and associated web page that show the relationship between the perimeter and area of a triangle.
It shows that a triangle with a constant perimeter does NOT have a constant...
More: lessons, discussions, ratings, reviews,...

Area of a Triangle  Math Open...

Triangles (Geometry)+ 
Java Applet 
Tool 

[0]

An interactive applet and associated web page that explain the area of a triangle. The applet shows a triangle that can be reshaped by dragging any vertex.
As it changes, the area is continuall...
More: lessons, discussions, ratings, reviews,...

Circumcircle of a Triangle  M...

Triangles (Geometry)+ 
Java Applet 
Tool 

[0]

An interactive applet and associated web page that demonstrate the properties of the circumcircle of a triangle.
The applet shows a triangle where the user can drag the vertices to reshap...
More: lessons, discussions, ratings, reviews,...

Congruent Triangles

Triangles (Geometry)+ 
Java Applet 
Tool 

[0]

Investigate the different side and angle arrangements (SSS or ASA) that cause two triangles to be always congruent or noncongruent.
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Congruent Triangles

Triangles (Geometry)+ 
Java Applet 
Tool 

[0]

An interactive applet and associated web page that demonstrate the concept of congruent triangles.
Applets show that triangles are congruent if they are the same, rotated, or reflected.
In ea...
More: lessons, discussions, ratings, reviews,...

Congruent Triangles  ASA  Ma...

Triangles (Geometry)+ 
Java Applet 
Tool 

[0]

An interactive applet and associated web page that shows how triangles that have
two angles and their included side the same must be congruent.
The applet shows two triangles, one of which can...
More: lessons, discussions, ratings, reviews,...

Congruent Triangles  SAS Mat...

Triangles (Geometry)+ 
Java Applet 
Tool 

[1]

An interactive applet and associated web page that shows how triangles that have
two sides and their included angle the same must be congruent.
The applet shows two triangles, one of which can...
More: lessons, discussions, ratings, reviews,...

Congruent Triangles AAS  Math...

Triangles (Geometry)+ 
Java Applet 
Tool 

[0]

An interactive applet and associated web page that show how triangles that have
two angles and a nonincluded side the same must be congruent.
The applet shows two triangles, one of which can be...
More: lessons, discussions, ratings, reviews,...

Congruent Triangles SSS  Math...

Triangles (Geometry)+ 
Java Applet 
Tool 

[0]

An interactive applet and associated web page that show how triangles that have all 3 sides the same length must be congruent.
The applet shows two triangles, one of which can be reshaped by dragg...
More: lessons, discussions, ratings, reviews,...

Construct 30690 triangle. M...

Triangles (Geometry)+ 
Java Applet 
Tool 

[0]

An interactive applet and associated web page that provide stepbystep animated instructions on how to
contruct 306090 triangle with given base length
using only a compass and straightedge.
...
More: lessons, discussions, ratings, reviews,...

Construct a median of a triang...

Triangles (Geometry)+ 
Java Applet 
Tool 

[0]

An interactive applet and associated web page that provide stepbystep instructions on how to find
a median of a triangle using only a compass and straightedge.
The method used involves bisecti...
More: lessons, discussions, ratings, reviews,...

Construct a triangle given thr...

Triangles (Geometry)+ 
Java Applet 
Tool 

[0]

An interactive applet and associated web page that provide stepbystep animated instructions on how to
construct a triangle given all three sides (SSS),
using only a compass and straightedge.
<...
More: lessons, discussions, ratings, reviews,...

Construct a triangle given two...

Triangles (Geometry)+ 
Java Applet 
Tool 

[0]

An interactive applet and associated web page that provide stepbystep animated instructions on how to
contruct a triangle given two angles and the included side length (ASA),
using only a compa...
More: lessons, discussions, ratings, reviews,...

Construct a triangle given two...

Triangles (Geometry)+ 
Java Applet 
Tool 

[0]

An interactive applet and associated web page that provide stepbystep animated instructions on how to
contruct a triangle given two sides and the included angle (SAS),
using only a compass and ...
More: lessons, discussions, ratings, reviews,...

Construct the Circumcircle of ...

Triangles (Geometry)+ 
Java Applet 
Tool 

[0]

An interactive applet and associated web page that provide stepbystep instructions on how to find
the circumcircle of a triangle using only a compass and straightedge.
The method used involves...
More: lessons, discussions, ratings, reviews,...

Construct the centroid of a tr...

Triangles (Geometry)+ 
Java Applet 
Tool 

[0]

An interactive applet and associated web page that provide stepbystep instructions on how to find
the centroid of a triangle using only a compass and straightedge.
The method used involves con...
More: lessons, discussions, ratings, reviews,...

Copying a Triangle with Compas...

Triangles (Geometry)+ 
Java Applet 
Tool 

[0]

An interactive applet and associated web page that provide stepbystep instructions on how to copy a given triangle
using only a compass and straightedge.
The animation can be run ei...
More: lessons, discussions, ratings, reviews,...

Dynamic Geometry Exploration: ...

Triangles (Geometry) 
Java Applet 
Tool 

[0]

This sketch allows students to explore the Triangle Inequality Theorem, the sum of the lengths of 2 sides of a triangle are greater than the length of the 3rd side. By dragging vertices and looking a...
More: lessons, discussions, ratings, reviews,...

Euclid's Elements, Book I, Def...

Triangles (Geometry)+ 
Java Applet 
Tool 

[0]

Gives Euclid's original definition of a rectilinear figure 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...

Triangles (Geometry) 
Java Applet 
Tool 

[0]

Euclid's proposition shows that the sum of two angles of a triangle is always less than the measure of two right angles. The guide then examines the structure of the proposition. To reset the applet...
More: lessons, discussions, ratings, reviews,...

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