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Technology 
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Buffon's Needle: An Analysis a...

Geometric probability (Geometry) 

Lesson Plan 

[0]

Buffon's Needle is one of the oldest problems in the field of geometrical probability. It was first stated in 1777. It involves dropping a needle on a lined sheet of paper and determining the probabil...
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Dyscalculator  Android

General (Geometry) 
Android 
Tool 

[0]

This calculator app made its first public demonstration last month at the 12th International Congress on Mathematical Education (ICME). Designed to help dyscalculics, Dyscalculator shows quantities in...
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Minutes Text Notes Pro

General (Geometry) 
Android 
Tool 
$ 
[0]

A note taking Android app that syncs to Dropbox and can render Markdown along with mathematical equations (MathJax support requires Android 4.4). It includes dictionary support, Tasker extension supp...
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Scientific Calculator graphic

General (Geometry) 
Android 
Tool 

[0]

This scientific calculator with some graphing capability uses either Cartesian or polar coordinate systems. Expressions can include any of the following:

Touch Fraction

Points and lines (Geometry)+ 
Android 
Tool 

[0]

Touch Fraction lets you visualize positive and negative
fractions  and zoom into equivalent fractions using the
rational representation diagram.
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Touch Pythagoras

Triangles (Geometry)+ 
Android 
Tool 

[0]

With this app the Pythagorean Theorem is interactive. You can change the lengths of the legs (dragging), the length of the hypotenuse with two fingers and zoom (pinch zoom) and rotate the figure (dra...
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An Introduction to Cabri 3D

Pyramids (Geometry)+ 
Cabri 
Activity 

[0]

This introduction is based on a workshop given by Eric Bainville at CabriWorld 2004. The first part introduces a few important features of Cabri 3D. This is followed by activities involving constructi...
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Brianchon's First Theorem

Straightedge and compass (Geometry) 
Cabri 
Tool 

[0]

A Cabri *.fig file written to illustrate Brianchon's First Theorem which can be stated, "If AB, CD, and EF are concurrent at X, and BC, DE, and FA are concurrent at Y, then AD, BE, and CF are concurre...
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Brianchon's Theorem

Straightedge and compass (Geometry) 
Cabri 
Tool 

[0]

A Cabri *.fig file written to illustrate Brianchon's Theorem which can be stated, "If each side of a hexagon touches a conic, then its diagonals are concurrent."
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Cabri 3D

Pyramids (Geometry)+ 
Cabri 
Tool 
$ 
[0]

Cabri 3D is interactive solid geometry software based on 3rd generation Cabri technology. It enables users to build and manipulate figures in 3D. It is entirely designed and developed by Cabrilog, and...
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Cabri Geometry II Plus

General (Geometry) 
Cabri 
Tool 
$ 
[0]

Cabri Geometry II Plus is a geometry construction tool allowing users to produce figures in the same way as one would using a sheet of paper, pencil, ruler, compass and eraser.
Evaluation...
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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...
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Getting Started in Cabri 3D

Pyramids (Geometry)+ 
Cabri 
Support Material 

[0]

Three video movie tutorials to give new users an introduction to using Cabri 3D as a teaching tool including:
 how to construct and label points
 construct lines and their intersections...
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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."
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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."
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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."
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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."
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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...
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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...
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Angles of a Triangle

Triangles (Geometry) 
Cabri Jr. 
Activity 

[0]

Students measure the interior and exterior angles of a triangle and find their relationships.
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Cabri Jr App

General (Geometry) 
Cabri Jr. 
Tool 

[0]

The Cabri Jr. App is dynamic geometry software and allows you to construct, analyze, and transform mathematical models and geometric diagrams. Explore the cuttingedge technology developed for TI by r...
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Cabri Jr. Sample Activities

General (Geometry) 
Cabri Jr. 
Activity 

[0]

The intent of each activity in this brief book is to allow students to use the TI83 Plus and TI84 Plus families of graphing calculators to explore and make conjectures related to key geometry concep...
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Cabri® Jr.: Interactive Geomet...

General (Geometry) 
Cabri Jr. 
Activity 

[0]

This comprehensive workbook includes over 25 activities that provide students with the opportunity to explore geometry using interactive activities and investigations, with a focus on concepts over ke...
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Circles in the Plane

Circles (Geometry) 
Cabri Jr. 
Activity 

[0]

Students investigate the relationships between the equation of a circle, the length of its radius, and the coordinates of its center.
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Dilations in the Plane

Dilation (Geometry) 
Cabri Jr. 
Activity 

[0]

A dilation is a transformation that produces a figure with a different size from that of the original figure. In this activity, students explore the properties of dilations and the relationships betwe...
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