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Topic (Course) 
Technology 
Type 
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Perimeter of a parallelogram ...

Quadrilaterals (Geometry) 
Java Applet 
Tool 

[0]

A web page and interactive applet show how to compute the perimeter of a parallelogram.
A parallelogram is shown that can be resized by dragging its vertices. As you drag, the perimeter is cont...
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Polygons Unit Quiz

Quadrilaterals (Geometry) 
JavaScript 
Tool 

[2]

Users interactively test their understanding of polygons and area with this unit quiz.
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Problem about a Quadrilateral

Quadrilaterals (Geometry) 
Java Applet 
Tool 

[0]

This applet illustrates what types of inscribed quadrilaterals are created by connecting the midpoints of a quadrilateral.
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Proof as Discovery: Kite Midpo...

Quadrilaterals (Geometry) 
Sketchpad 
Tool 

[0]

Students investigate and prove a property of kites, and use the proof to make a discovery about other quadrilaterals. The link to the tool itself is to a zip file that contains both the sketch and...
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Proof as Verification: Areas

Quadrilaterals (Geometry) 
Sketchpad 
Tool 

[0]

Students form a conjecture about the ratio of two areas in a quadrilateral, and use Sketchpad to search for a proof. In the process they verify or disprove their results for two different kinds of ...
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Quadrilateral Exploration: Sha...

Quadrilaterals (Geometry) 
Sketchpad 
Tool 

[0]

Students first use the seven "Quadrilateral Makers" (square maker, rhombus maker, rectangle maker, parallelogram maker, kite maker, trapezoid maker, and quadrilateral maker) to make a design of their ...
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Quadrilaterals

Quadrilaterals (Geometry) 
JavaScript 
Tool 

[0]

The user reviews quadrilaterals and the special quadrilaterals commonly used in geometry. After viewing examples, users can interactively test their understanding of the different properties of quadr...
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Quadrilaterals

Quadrilaterals (Geometry) 
Sketchpad 
Tool 

[0]

Investigate the parallelogram, rectangle, square, rhombus, and isosceles trapezoid. Includes an activity in PDF format and a prepared sketch.
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Quadrilaterals  Math Open Ref...

Quadrilaterals (Geometry) 
Java Applet 
Tool 

[0]

An interactive applet and associated web page showing the properties of a quadrilateral. The applet shows a quadrilateral with draggable vertices.
The web page has an extensive list of the variou...
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Quadrilaterals in Quadrilatera...

Quadrilaterals (Geometry) 
Java Applet 
Tool 

[0]

Java Sketchpad applet that illustrates the remarkable fact that the midpoints of any quadrilateral form a parallelogram.
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Right Angles

Quadrilaterals (Geometry) 
Java Applet 
Tool 

[0]

Provides an applet that demonstrates how to construct right angle using a straightedge and a compass.
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Special Triangles

Quadrilaterals (Geometry) 
Java Applet 
Tool 

[0]

Provides an applet that demonstrates how to construct triangle given the lengths of the sides.
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Tetragon, definition and prope...

Quadrilaterals (Geometry) 
Java Applet 
Tool 

[0]

A web page and interactive applet illustrating the properties of a tetragon (4 sided polygon, aka quadrilateral).
The applet shows a tetragon where the user can drag any vertex to reshape...
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The Area of a Trapezium

Quadrilaterals (Geometry) 
Java Applet 
Tool 

[0]

This applet demonstrates the source of the area formula for the trapezium.
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The Geometer's Sketchpad  3 L...

Quadrilaterals (Geometry) 
Computer 
Tool 

[0]

With Geometer's Sketchpad you can open these applets and do the three labs on rotation/translation, area of a parallelogram, and area of a rectangle.
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Two Squares

Quadrilaterals (Geometry) 
Java Applet 
Tool 

[0]

Find out what quadrilateral is formed at the midpoints of the segments connecting these two squares.
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Two Squares  Maximum Area

Quadrilaterals (Geometry) 
Java Applet 
Tool 

[0]

This applet has a corresponding problem that deals with maximizing the area of two overlapping squares.
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Two Tapes

Quadrilaterals (Geometry) 
Java Applet 
Tool 

[0]

Figure out what quadrilateral is created by these two pieces of overlapping tape using the provided applet.
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What Is A Quadrilateral?

Quadrilaterals (Geometry) 
Java Applet 
Tool 

[0]

This applet illustrates what a quadrilateral is.
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What Is A Trapezium?

Quadrilaterals (Geometry) 
Java Applet 
Tool 

[0]

This applet illustrates what a trapezium is.
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XP Math: Finding Areas of Para...

Quadrilaterals (Geometry) 
Flash 
Tool 

[0]

In this game, students race the clock to find the areas (with units) of parallelograms.
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XP Math: Finding Perimeters of...

Quadrilaterals (Geometry) 
Flash 
Tool 

[0]

In this game, students race the clock to find perimeters of parallelograms.
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Combinations

Rcombinations (Discrete Math) 
TINspire 
Activity 

[0]

This activity introduces students to combinations. They derive the formula for the number of combinations of n objects taken r at a time by starting with a list of permutations and eliminating those t...
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MathStudio

Radicals (Algebra II) 
Computer 
Tool 

[1]

MathStudio is an opensource program intended to be an easy and powerful symbolic calculator. It differs from other programs of this type both because of the way the user inputs the expression and bec...
More: lessons, discussions, ratings, reviews,...

Addition and Subtraction of Ra...

Radicals (Algebra) 
Flash 
Support Material 

[0]

This minilesson explains how to add and subtract like and unlike radicals. Like radicals are radicals that have the same index and the same radicand.
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