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Resource Name 
Topic (Course) 
Technology 
Type 
$? 
Rating 

Constructing the circumcenter ...

Straightedge and compass (Geometry) 
Java Applet 
Tool 

[0]

An interactive applet and associated web page that provide stepbystep animated instructions on how to
construct the circumcenter of a triangle.
The animation can be run either co...
More: lessons, discussions, ratings, reviews,...

Constructing the incenter of a...

Straightedge and compass (Geometry) 
Java Applet 
Tool 

[0]

An interactive applet and associated web page that provide stepbystep animated instructions on how to
construct the incenter of a triangle.
The animation can be run either contin...
More: lessons, discussions, ratings, reviews,...

Constructing the orthocenter o...

Straightedge and compass (Geometry) 
Java Applet 
Tool 

[0]

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

Constructinga 60° angle with c...

Straightedge and compass (Geometry) 
Java Applet 
Tool 

[0]

An interactive applet and associated web page that show how to construct a 60° angle with a compass and straightedge.
The animation can be singlestepped or run as a continuous movie.
<...
More: lessons, discussions, ratings, reviews,...

Copying a Line Segment Using C...

Straightedge and compass (Geometry) 
Java Applet 
Tool 

[0]

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

Copying a Triangle with Compas...

Straightedge and compass (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,...

Copying an Angle Using Compass...

Straightedge and compass (Geometry) 
Java Applet 
Tool 

[0]

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

Desargues Theorem

Straightedge and compass (Geometry) 
Cabri 
Tool 

[0]

A Cabri *.fig file written to illustrate Desargues Theorem which can be stated, "If the lines joining corresponding vertices of two triangles are concurrent, then the intersections of corresponding si...
More: lessons, discussions, ratings, reviews,...

Dividing a Line Segment Using ...

Straightedge and compass (Geometry) 
Java Applet 
Tool 

[0]

An interactive applet and associated web page that provide stepbystep instructions on how to
divide a line segment into any number of equal parts,
using only a compass and straightedge. The ...
More: lessons, discussions, ratings, reviews,...

Find the center of a circle. M...

Straightedge and compass (Geometry) 
Java Applet 
Tool 

[0]

An interactive applet and associated web page that provide stepbystep instructions on how to find the center of a circle
using any rightangled object, such as a piece of paper.
The method use...
More: lessons, discussions, ratings, reviews,...

Finding the Center of a Circle...

Straightedge and compass (Geometry) 
Java Applet 
Tool 

[0]

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

Funhouse Mirrors

Straightedge and compass (Geometry) 
Sketchpad 
Tool 

[0]

A Geometer's Sketchpad tool for constructing distorted images that can be viewed undistorted with a cylindrical mirror. The file contains tabbed pages with several images, a grid for students to draw...
More: lessons, discussions, ratings, reviews,...

GeoCon

Straightedge and compass (Geometry) 
iPhone 
Tool 
$ 
[1]

GeoCon is designed to be used by students, teachers and math enthusiasts studying plane geometry. With GeoCon various constructions can be created with the touch of a finger. Resolve construction task...
More: lessons, discussions, ratings, reviews,...

GeoCon HD

Straightedge and compass (Geometry) 
iPad 
Tool 
$ 
[1]

GeoCon HD is designed to be used by students, teachers and math enthusiasts studying plane geometry. With GeoCon HD various constructions can be created with the touch of a finger. Resolve constructio...
More: lessons, discussions, ratings, reviews,...

Geometria

Straightedge and compass (Geometry) 
Computer 
Tool 

[0]

Geometria is free (GPL) crossplatform software based on a tworole (teacher, student) model. The teacher creates a problem, provides it with an answer and saves the problem in a file. The student ope...
More: lessons, discussions, ratings, reviews,...

La Hire's Theorem

Straightedge and compass (Geometry) 
Cabri 
Tool 

[0]

A Cabri *.fig file written to illustrate La Hire's Theorem which can be stated, "If P lies on the polar of Q, then Q lies on the polar of P."
More: lessons, discussions, ratings, reviews,...

Pappus's Theorem

Straightedge and compass (Geometry) 
Cabri 
Tool 

[0]

A Cabri *.fig file written to illustrate Pappus's Theorem which can be stated, "If alternate vertices of a hexagon are collinear, then the intersections of opposite sides are collinear."
More: lessons, discussions, ratings, reviews,...

Pascal's Theorem

Straightedge and compass (Geometry) 
Cabri 
Tool 

[0]

A Cabri *.fig file written to illustrate Pascal's Theorem which can be stated, "If the vertices of a hexagon lie on a conic, then the intersections of opposite sides are collinear."
More: lessons, discussions, ratings, reviews,...

The 3 Tangents Theorem

Straightedge and compass (Geometry) 
Cabri 
Tool 

[0]

A Cabri *.fig file written to illustrate The 3 Tangents Theorem which can be stated, "If the triangle ABC touches the conic at P, Q, and R as shown, then AP, BQ, and CR are concurrent."
More: lessons, discussions, ratings, reviews,...

The 3 Tangents and 3 Chords Th...

Straightedge and compass (Geometry) 
Cabri 
Tool 

[0]

A Cabri *.fig file written to illustrate The 3 Tangents and 3 Chords Theorem which can be stated, "Triangle ABC is inscribed in a conic. If the tangent at A meets the chord BC at P, the tangent at B m...
More: lessons, discussions, ratings, reviews,...

The Converse of Pascal's Theor...

Straightedge and compass (Geometry) 
Cabri 
Tool 

[0]

A Cabri *.fig file written to illustrate The Converse of Pascal's Theorem which can be stated, "If the points A, B, C, D, E, F are such that the intersections of AC and BD, of AE and DF, and of BE and...
More: lessons, discussions, ratings, reviews,...

The Focusdirectrix Definition

Straightedge and compass (Geometry) 
Java Applet 
Tool 

[0]

The CabriJava applet shows a conic with focus F, directrix L passing through a point P. The choice of P determines the eccentricity  as the ratio PQ/PF. You can move F and P to see what shapes ar...
More: lessons, discussions, ratings, reviews,...

Loan Calculator

Student loans (Financial Education) 
Java Applet 
Tool 

[0]

Explore how to pay off a loan, and how interest affects payment. You can control the the frequency of the payments and the period (number of years) of payments or the amount of each payment.
More: lessons, discussions, ratings, reviews,...

Student Loan Debt Calculator

Student loans (Financial Education) 
Calculator 
Tool 

[0]

The "Student loan debt calculator" applies two simple principles to paying off highinterest debt.
1. Consolidate the existing student loans
2. Use the extra cash every month to pay off other hi...
More: lessons, discussions, ratings, reviews,...

From Probability to Combinator...

Subsets and Combinations (Discrete Math) 
Java Applet 
Lesson Plan 

[1]

Looks at data structures and their applications to probability theory.
More: lessons, discussions, ratings, reviews,...

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