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30 - 60 - 90 Triangles - Math ...	Right Triangles (Geometry)+	Java Applet	Tool		[0]
An interactive applet and associated web page that demonstrate the properties of a 30-60-90 triangle. The applet shows a right triangle that can be resized by dragging any vertex. As it is drag... More: lessons, discussions, ratings, reviews,...
3:4:5 Triangles - Math Open Re...	Special right triangle (Geometry)+	Java Applet	Tool		[0]
An interactive applet and associated web page that demonstrate the properties of a 3:4:5 triangle - one of the Pythagorean triples. The applet shows a right triangle that can be resized by draggin... More: lessons, discussions, ratings, reviews,...
45-45-90 Triangles - Math Open...	Special right triangle (Geometry)+	Java Applet	Tool		[0]
An interactive applet and associated web page that demonstrate the properties of a 45-45-90 isosceles right triangle. The applet shows a right triangle that can be resized by dragging any vertex. ... More: lessons, discussions, ratings, reviews,...
A Dynamic Proof	Pythagorean theorem (Geometry)	Sketchpad	Activity		[0]
Students create a sketch in which a dramatic animation shows how the sum of the areas of two squares is equal to the area of the third square. The link to the activity itself is to a zip file tha... More: lessons, discussions, ratings, reviews,...
A Dynamic Proof	Pythagorean theorem (Geometry)	Sketchpad	Tool		[0]
Students create a sketch in which a dramatic animation shows how the sum of the areas of two squares is equal to the area of the third square. The link to the tool itself is to a zip file that co... More: lessons, discussions, ratings, reviews,...
A Geometric Proof of the Pytha...	Pythagorean theorem (Geometry)	PowerPoint	Tool		[0]
This PowerPoint presentation uses animation and color to show a step-by-step geometric proof of the Pythagorean Theorem. It is assumed that students are already familiar with the theorem and its mean... More: lessons, discussions, ratings, reviews,...
A Right Triangle with Squares	Pythagorean theorem (Geometry)	Sketchpad	Activity		[0]
Students make a square tool and use the tool to investigate the Pythagorean Theorem and its converse. The link to the activity itself is to a zip file that contains the activity in pdf format. ... More: lessons, discussions, ratings, reviews,...
Circles Around Pythagoras	Right Triangles (Geometry)	Computer	Activity		[2]
A problem on finding the areas created within three concentric circles. More: lessons, discussions, ratings, reviews,...
Euclid's Elements, Book I, Pro...	Pythagorean theorem (Geometry)	Java Applet	Tool		[0]
Euclid's proposition lays out the Pythagorean Theorem - the sum of the squares of the sides of a right triangle equal the square of the hypotenuse. The guide then examines the structure of the proposi... More: lessons, discussions, ratings, reviews,...
Euclid's Elements, Book I, Pro...	Pythagorean theorem (Geometry)	Java Applet	Tool		[0]
Euclid's proposition states that if the square of one side equals the sum of the squares of the other two side, then the angle between the two sides which sum is a right angle. The guide then examine... More: lessons, discussions, ratings, reviews,...
Geoboard	Right Triangles (Geometry)	Java Applet	Tool		[0]
Use geoboard to illustrate area, perimeter, and rational number concepts. More: lessons, discussions, ratings, reviews,...
Geometria	Right Triangles (Geometry)+	Computer	Tool		[0]
Geometria is free (GPL) cross-platform software based on a two-role (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,...
Learn Trig...The Easy Way	Right Triangles (Geometry)+	Java Applet	Tool		[2]
Introduction You know how to find the length of the third side of a right triangle when the lengths of the two other sides were given, but how does a person determine the length of a side if t... More: lessons, discussions, ratings, reviews,...
Leonardo da Vinci's Proof	Pythagorean theorem (Geometry)	Sketchpad	Activity		[0]
Students use reflection and rotation to build a sketch that demonstrates a famous proof by Leonardo. The link to the activity itself is to a zip file that contains both the activity in pdf format ... More: lessons, discussions, ratings, reviews,...
Leonardo da Vinci's Proof	Pythagorean theorem (Geometry)	Sketchpad	Tool		[0]
Students use reflection and rotation to build a sketch that demonstrates a famous proof by Leonardo. The link to the tool itself is to a zip file that contains both the sample sketch (designed to ... More: lessons, discussions, ratings, reviews,...
Miscellaneous: Pythagorean The...	Pythagorean theorem (Geometry)	Flash	Tool	$	[0]
Flash-based introduction to finding the hypotenuse given the lengths of the legs of a right triangle. College Cram charges access fees by the month or by the semester for most resources. To get a ... More: lessons, discussions, ratings, reviews,...
Perpendicular Slopes	Pythagorean theorem (Geometry)	TI-Nspire	Activity		[0]
In this activity, students investigate the �negative reciprocal� relationship between the slopes of perpendicular lines. The final phase of the activity is appropriate for more advanced students as th... More: lessons, discussions, ratings, reviews,...
Pythagoras Plugged In: Proofs ...	Pythagorean theorem (Geometry)	Sketchpad	Activity	$	[0]
This book guides students through a variety of proofs and applications of the Pythagorean theorem. By constructing and dynamically manipulating figures, students visualize the theorem and gain insight... More: lessons, discussions, ratings, reviews,...
Pythagoras Theorem	Pythagorean theorem (Geometry)	Java Applet	Tool		[0]
Interactive proof of Pythagorean theorem (Euclid's proof) using geometric transformations. More: lessons, discussions, ratings, reviews,...
Pythagoras graphical proof - M...	Pythagorean theorem (Geometry)	Java Applet	Tool		[1]
An interactive applet and associated web page that demonstrates a graphical proof of Pythagoras' Theorem. The applet shows a right triangle that is replicated and then moved around to demonstra... More: lessons, discussions, ratings, reviews,...
Pythagoras' Theorem - Math Ope...	Pythagorean theorem (Geometry)	Java Applet	Tool		[0]
An interactive applet and associated web page that illustrate Pythagoras' Theorem. The applet shows a right triangle that can be resized by dragging any vertex. As it is being dragged the formula... More: lessons, discussions, ratings, reviews,...
Pythagorean Explorer	Pythagorean theorem (Geometry)	Java Applet	Tool		[1]
This applet allows the viewer to calculate the length of one side of a triangle using the Pythagorean Theorem. More: lessons, discussions, ratings, reviews,...
Pythagorean Theorem	Pythagorean theorem (Geometry)	Computer	Lesson Plan		[0]
Learn how the Pythagorean Theorem works and how to apply it. More: lessons, discussions, ratings, reviews,...
Pythagorean Theorem	Pythagorean theorem (Geometry)	Computer	Support Material		[1]
Discussion of exposition, history, and proof of Pythagorean Theorem More: lessons, discussions, ratings, reviews,...
Pythagorean Theorem	Pythagorean theorem (Geometry)	Java Applet	Support Material		[1]
Read explanations of forty-three proofs of the Pythagorean theorem. Some of the proofs have additional pages with applets to explore. More: lessons, discussions, ratings, reviews,...
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