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Topic (Course) 
Technology 
Type 
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Why SSA does NOT prove congrue...

Congruence (Geometry) 
Flash 
Activity 

[1]

An interactive applet and associated web page that shows that sidesideangle is not enough
to prove congruence, because two triangles can meet the condition.
The applet shows two triangles, on...
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Why AAA does not prove congrue...

Congruence (Geometry)+ 
Flash 
Activity 

[1]

An interactive applet and associated web page that shows that angleangleangle (AAA) is not enough
to prove congruence.
The applet shows two triangles, one of which can be dragged to resize it...
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Dimension and Scale Dialogue

Similarity (Geometry) 
Java Applet 
Support Material 

[1]

Discusses fractal dimension, how that dimension relates to scale, and the formula needed to calculate the fractal dimension of an object.
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Congruent Triangles (1)

Congruence (Geometry) 
Java Applet 
Tool 

[1]

An applet is provided that helps you visualize the proofs to the problems given that deal with congruent triangles.
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Side Length and Area of Simila...

Similarity (Geometry) 
Java Applet 
Tool 

[1]

The user can manipulate the side lengths of one of two similar rectangles and the scale factor to learn about how the side lengths, perimeters, and areas of the two rectangles are related.
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Congruent Triangles  SAS Mat...

Congruence (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...
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Dimension for Irregular Fracta...

Similarity (Geometry) 
Java Applet 
Support Material 

[1]

Discusses the problem of determining the fractal dimension of irregular fractals and how the scale is indeterminite in these fractals.
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Congruent Triangles

Congruence (Geometry) 
Java Applet 
Tool 

[1]

This page provides three applets that you manipulate in order to discover rotation, translation, and reflection. Then below are descriptions of sideangleside, anglesideangle, and sidesideside (...
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Two Regular Triangles

Congruence (Geometry) 
Java Applet 
Tool 

[1]

This applet corresponds to a problem dealing with triangle congruence within 2 overlapping regular triangles.
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Similar Figures

Similarity (Geometry) 
Java Applet 
Tool 

[1]

This applet demonstrates how similar figures are created through transformations.
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Similar Triangles

Similarity (Geometry) 
Java Applet 
Tool 

[1]

This applet tests your knowledge of the properties of similar triangles.
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Midpoint  Similar Triangles

Similarity (Geometry) 
Java Applet 
Tool 

[1]

This applet demonstrates the relationship of the segment connecting two midpoints of a triangle and the opposite side.
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MidPoint Theorem

Similarity (Geometry) 
Java Applet 
Tool 

[1]

Students investigate what is so special about the midpoints of a triangle. They discover the midpoint theorem and can answer an exploration question.
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Congruence Theorems

Congruence (Geometry) 
Java Applet 
Tool 

[1]

In this investigation, the user can explore the conditions that guarantee uniqueness of a triangle, quadrilateral, or pentagon regardless of location or orientation. Each set of conditions results in ...
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Paper Folding Activity

Similarity (Geometry) 
Java Applet 
Lesson Plan 

[0]

Students fold a sheet of paper (a manipulative) and also simulate folding using a JavaSketchpad activity to observe geometric relations. Students think about the angle measurements and the side measur...
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Math Forum Teacher Packet: TI ...

Similarity (Geometry) 
TINspire 
Lesson Plan 

[0]

This packet contains a copy of the original problem used to create the activity, rationale and explanation behind the “I Notice, I Wonder” focal activity, and some thoughts on why this activity works ...
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Coordinates and Similar Figure...

Similarity (Geometry) 
Computer 
Support Material 

[0]

Provides definitions and illustrations on coordinates and similar figures.
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Coordinates and Similar Figure...

Similarity (Geometry) 
Computer 
Support Material 

[0]

Provides definitions and illustrations on coordinates and similar figures.
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Geometry, Section 1

Congruence (Geometry) 
Computer 
Support Material 

[0]

A collection of illustrated concepts, including problems for students to work out, and standalone word problems. Includes automated feedback. Pre and posttests, answer sheets, additional help, tools...
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Midpoint and Congruence (Geome...

Congruence and similarity (Geometry) 
Flash 
Support Material 

[0]

This minilesson explains basic concepts of how to identify congruent segments and to find their midpoint.
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Congruence and Similarity (Get...

Congruence and similarity (Geometry) 
Flash 
Support Material 

[0]

This minilesson explains the basics of proving congruence and similarity.
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Similar Polygons (Geometry)

Congruence and similarity (Geometry) 
Flash 
Support Material 

[0]

This minilesson explains the basics of similar polygons and congruent polygons, and the calculation of a scale factor for an enlargement or reduction. From there it explains how to write similarity s...
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Congurent and Similar Triangle...

Congruence and similarity (Geometry) 
Flash 
Support Material 

[0]

This minilesson explains congruence and similarity in triangles, using these concepts to prove triangles congruent, or to determine missing measurements.
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SelfSimilarity Dialogue

Similarity (Geometry) 
Java Applet 
Support Material 

[0]

Discusses how fractals are selfsimilar objects.
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Congruent Triangles

Congruence and similarity (Geometry) 
Java Applet 
Tool 

[0]

This manipulative allows you to construct two triangles from various combinations of sides and angles. You can choose to work with any one of four different cases: SSS, SAS, ASA, and SSA
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