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Technology 
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Euclid's Elements, Book I, Def...

Obtuse (Geometry) 
Java Applet 
Tool 

[0]

Gives Euclid's original definitions of an equilateral, isosceles, scalene, rightangled, obtuseangled, and acuteangled triangle and then examines the definitions' validity and durability. To reset t...
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Euclid's Elements, Book II, Pr...

Obtuse (Geometry) 
Java Applet 
Tool 

[0]

Euclid's proposition states properties about the sides and angles of obtuse triangles. The guide then examines the structure of the proposition. To reset the applet, press "r" while your cursor is ov...
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GeomeTree

Obtuse (Geometry) 
iPad 
Tool 
$ 
[0]

GeomeTree enables the manipulation of geometric trees with 2 to 7 branches via multitouch gestures. Change angle between branches and change common ratio. Selectable themes draw trees with un...
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Triangle Classification

Obtuse (Geometry) 
Java Applet 
Tool 

[0]

An interactive Java Illustration for classification of triangles. The types displayed are scalene, acute, obtuse, right, isosceles, and equilateral.
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Triangle Classification Game

Obtuse (Geometry) 
Java Applet 
Tool 

[1]

In this activity the interactivity attempts to train the user in the classification of triangles with respect to sides and internal angles. The user should move the vertices of a triangle on a square ...
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Triangles

Obtuse (Geometry) 
JavaScript 
Tool 

[0]

The user reviews different classifications of triangles by their sides and angles. After viewing examples, users can interactively practice matching different triangles with their correct classificat...
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Types of Triangles (Acute, Obt...

Obtuse (Geometry) 
Java Applet 
Tool 

[0]

An interactive applet and associated web page that demonstrate the three types of triangle: acute, obtuse and right.
The applet shows a triangle that is initially acute (all angles less t...
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XP Math: Flip Card  Angle Typ...

Obtuse (Geometry) 
Flash 
Tool 

[0]

In this memory/matching game, students flip cards over in pairs, trying to match the description of an angle with a graphic representation of that angle.
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Right Triangle Geometry

Of Acute Angles (Trigonometry) 
Java Applet 
Activity 

[2]

This eModule presents realworld problems that motivate students to work with right triangle geometry. Interactive worksheets and diagrams with feedback help students learn to solve for unknown angles...
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The Art Gallery Problem

Of Acute Angles (Trigonometry) 
TINspire 
Activity 

[0]

The question of where patrons should stand to enjoy the best view of a painting is one that art gallery curators must consider on a regular basis. For this activity, we will consider a painting that i...
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Right Triangle Geometry

Of Acute Angles (Trigonometry) 
Java Applet 
Lesson Plan 

[0]

This eModule presents realworld problems that motivate students to work with right triangle geometry. Interactive worksheets and diagrams with feedback help students learn to solve for unknown angles...
More: lessons, discussions, ratings, reviews,...

Triangle Geometry

Of Acute Angles (Trigonometry) 
Java Applet 
Lesson Plan 

[1]

This eModule presents realworld problems that motivate students to work with triangle geometry. Interactive worksheets and diagrams with feedback help students learn to solve for unknown angles and s...
More: lessons, discussions, ratings, reviews,...

Cosecant Function in a Right T...

Of Acute Angles (Trigonometry) 
Flash 
Tool 

[0]

Flashbased demonstration of the procedure for finding the cosecant of an acute angle of a right triangle, given the lengths of the opposite side and hypotenuse. College Cram charges access fees ...
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Cosine and ArcCosine in a Righ...

Of Acute Angles (Trigonometry) 
Flash 
Tool 

[0]

Flashbased introduction to finding the third value when two values, of adjacent side, hypotenuse, and angle, are given. College Cram charges access fees by the month or by the semester for most r...
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Cotangent Function in a Right ...

Of Acute Angles (Trigonometry) 
Flash 
Tool 

[0]

Flashbased introduction to finding the value of an acute angle in a right triangle given its adjacent and opposite side lengths. College Cram charges access fees by the month or by the semester f...
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Secant Function in a Right Tri...

Of Acute Angles (Trigonometry) 
Flash 
Tool 

[0]

Flashbased demonstration of the procedure for finding the secant of an acute angle of a right triangle, given the lengths of the adjacent side and hypotenuse. College Cram charges access fees by...
More: lessons, discussions, ratings, reviews,...

Graphs of Sine, Cosine, and Ta...

Of Any Angle (Trigonometry) 
TINspire 
Activity 

[0]

Students are introduced to the shapes of the sine, cosine, and tangent graphs. They will use a unit circle to calculate the x and y lengths of a triangle placed at different values along the circle. T...
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Triangle Geometry

Of Any Angle (Trigonometry) 
Java Applet 
Activity 

[1]

This eModule presents realworld problems that motivate students to work with triangle geometry. Interactive worksheets and diagrams with feedback help students learn to solve for unknown angles and s...
More: lessons, discussions, ratings, reviews,...

Triangle Geometry

Of Any Angle (Trigonometry) 
Java Applet 
Lesson Plan 

[1]

This eModule presents realworld problems that motivate students to work with triangle geometry. Interactive worksheets and diagrams with feedback help students learn to solve for unknown angles and s...
More: lessons, discussions, ratings, reviews,...

The Six Trigonometric Function...

Of Any Angle (Trigonometry) 
Flash 
Support Material 

[0]

This minilesson explains the basic concepts, relations, and properties used to find the trigonometric values of any angle.
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Trigonometric Functions of Any...

Of Any Angle (Trigonometry) 
Flash 
Support Material 

[0]

This minilesson explains trig functions for any angle, as well as the relationship of trigonometric functions for acute angles.
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Patterns, Relations, and Funct...

One Variable Equations (Algebra) 
Java Applet 
Activity 

[1]

This eModule presents sequences of geometric patterns and encourages students to generate rules and functions describing relationships between the pattern number and characteristics of the pattern. S...
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Math Forum Teacher Packet: TI...

One Variable Equations (Algebra) 
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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Math Forum Teacher Packet: TI...

One Variable Equations (Algebra) 
TINspire 
Lesson Plan 

[0]

This packet contains a copy of the original problem used to create the activity, rationale and explanation behind the “Doing it Wrong” focal activity, and some thoughts on why this activity works well...
More: lessons, discussions, ratings, reviews,...

Patterns, Relations, and Funct...

One Variable Equations (Algebra) 
Java Applet 
Lesson Plan 

[0]

These guided, interactive activities present sequences of geometric patterns and encourage students to generate rules and functions describing relationships between the pattern number and characterist...
More: lessons, discussions, ratings, reviews,...

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