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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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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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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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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...
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Constructing a hexagon inscrib...

Straightedge and compass (Geometry) 
Flash 
Tool 

[0]

An interactive applet and associated web page that provide stepbystep instructions on how to construct
a hexagon inscribed in a circle using only a compass and straightedge.
The method begin...
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Constructing a pentagon inscri...

Straightedge and compass (Geometry) 
Flash 
Tool 

[0]

An interactive applet and associated web page that provide stepbystep instructions on how to construct
a pentagon inscribed in a circle using only a compass and straightedge.
The method begins...
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Constructing a regular hexagon...

Straightedge and compass (Geometry) 
Flash 
Tool 

[0]

An interactive applet and associated web page that provide stepbystep instructions on how to construct
a regular hexagon using only a compass and straightedge.
The method begins with a line se...
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Printable compass / straighted...

Straightedge and compass (Geometry) 
Flash 
Activity 

[2]

A web page that contains a list of 35 printable worksheets for compass and straightedge constructions.
Each printable sheet has 2 or 3 problems and links back to the pages interactively explaining th...
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Bisecting a Line using Compass...

Straightedge and compass (Geometry) 
Java Applet 
Tool 

[1]

An interactive applet and associated web page that provide stepbystep instructions on how to bisect a line using only a compass and straightedge.
The animation can be run either continuously lik...
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Bisecting an Angle using Compa...

Straightedge and compass (Geometry) 
Java Applet 
Tool 

[0]

An interactive applet and associated web page that provide stepbystep instructions on how to bisect an angle using only a compass and straightedge.
The animation can be run either continuously l...
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Construct 30690 triangle. M...

Straightedge and compass (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.
...
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Construct Tangents from a Poin...

Straightedge and compass (Geometry) 
Java Applet 
Tool 

[0]

An interactive applet and associated web page that demonstrate how to construct the
two possible tangents to a circle from an external given point, using compass and straightedge.
It starts wi...
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Construct a 45° angle with ...

Straightedge and compass (Geometry) 
Java Applet 
Tool 

[2]

An interactive applet and associated web page that show how to construct a 45° angle with a compass and straightedge.
The animation can be singlestepped or run as a continuous movie.
...
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Construct a 90 deg angle with ...

Straightedge and compass (Geometry) 
Java Applet 
Activity 

[0]

An interactive applet and associated web page that show how to construct a 90° right angle with a compass and straightedge.
The animation can be singlestepped or run as a continuous movie.
<...
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Construct a Parallel through 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 a line parallel to a given line through a given point off the line.
...
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Construct a circle Through 3 P...

Straightedge and compass (Geometry) 
Java Applet 
Tool 

[1]

An interactive applet and associated web page that demonstrate how to construct the circle that passes through all three given points.
The applet starts with three given points and the user can si...
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Construct a median of a triang...

Straightedge and compass (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...
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Construct a perpendicular at e...

Straightedge and compass (Geometry) 
Java Applet 
Tool 

[1]

An interactive applet and associated web page that provide stepbystep instructions on how to
construct a perpendicular at the endpoint of a ray using only a compass and straightedge.
...
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Construct a tangent at a poin...

Straightedge and compass (Geometry) 
Java Applet 
Tool 

[0]

An interactive applet and associated web page that demonstrate how to construct a
tangent to a cicrle at a given point on the circle, using compass and straightedge.
It starts with the given c...
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