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Types of Triangles	Isosceles (Geometry)+	Java Applet	Tool	[4]
This JavaSketchpad applet accompanies the tPoW, Types of Triangles. Students are able to drag and manipulate four triangles and by noticing what happens they classify the triangles as either scalene, ... More: lessons, discussions, ratings, reviews,...
Right Triangle Geometry	Right (Geometry)	Java Applet	Activity	[2]
This eModule presents real-world 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,...
Why SSA does NOT prove congrue...	Triangles (Geometry)	Flash	Activity	[1]
An interactive applet and associated web page that shows that side-side-angle is not enough to prove congruence, because two triangles can meet the condition. The applet shows two triangles, on... More: lessons, discussions, ratings, reviews,...
Why AAA does not prove congrue...	Triangles (Geometry)	Flash	Activity	[1]
An interactive applet and associated web page that shows that angle-angle-angle (AAA) is not enough to prove congruence. The applet shows two triangles, one of which can be dragged to resize it... More: lessons, discussions, ratings, reviews,...
A Min/Max Problem	Triangles (Geometry)	Sketchpad	Activity	[1]
A guided exploration, using Geometer's Sketchpad, of the area of a triangle formed between two fixed rays, using a third ray with a movable end point. More: lessons, discussions, ratings, reviews,...
Simson Line of a Triangle	Centers of triangles (Geometry)	Java Applet	Tool	[1]
Use this applet to discover how to construct the Simson line of a triangle. More: lessons, discussions, ratings, reviews,...
Euclid's Elements, Book I, Pro...	Triangles (Geometry)	Java Applet	Tool	[1]
Euclid's proposition shows that the angle opposite the greatest side of a triangle is greatest. The guide then examines the structure of the proposition. To reset the applet, press "r" while your cu... More: lessons, discussions, ratings, reviews,...
Triangle Classification Game	Isosceles (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 ... More: lessons, discussions, ratings, reviews,...
Types of Triangles	Isosceles (Geometry)+	Sketchpad	Technology PoW	[3]
Students use a GSP sketch or an interactive web page to drag and manipulate four triangles. They identify one of each type: scalene, isosceles, equilateral, and right. NOTE: A free... More: lessons, discussions, ratings, reviews,...
Polygons Unit Quiz	Triangles (Geometry)	JavaScript	Tool	[2]
Users interactively test their understanding of polygons and area with this unit quiz. More: lessons, discussions, ratings, reviews,...
Types of Triangles	Isosceles (Geometry)+	Java Applet	Activity	[1]
This activity is available in Word, PDF, or HTML format and at two different levels (an introduction to types of triangles, and a more advanced version). Students use a GSP sketch or interactive web ... More: lessons, discussions, ratings, reviews,...
Triangle Geometry	Obtuse (Geometry)+	Java Applet	Activity	[1]
This eModule presents real-world 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	Obtuse (Geometry)+	Java Applet	Lesson Plan	[1]
This eModule presents real-world 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,...
Picture Proof of the Pythagore...	Law of sines (Geometry)	Java Applet	Tool	[1]
Step-by-step picture proof of the Pythagorean theorem. More: lessons, discussions, ratings, reviews,...
Identify These Triangles	Triangles (Geometry)	Java Applet	Tool	[1]
This applet asks you to determine the types of triangles illustrated. More: lessons, discussions, ratings, reviews,...
Geoboard - Circular	Triangles (Geometry)	Java Applet	Tool	[1]
Use circular geoboard to illustrate angles and degrees. More: lessons, discussions, ratings, reviews,...
Centers of Triangles	Centers of triangles (Geometry)	Java Applet	Tool	[1]
See the different centers of a triangle and how they are related to the medians, perpendicular bisectors, and altitudes of the triangle. Students can manipulate the triangle and try to answer the fol... More: lessons, discussions, ratings, reviews,...
Congruent Triangles - SAS- Mat...	Triangles (Geometry)	Java Applet	Tool	[1]
An interactive applet and associated web page that shows how triangles that have two sides and their included angle the same must be congruent. The applet shows two triangles, one of which can... More: lessons, discussions, ratings, reviews,...
Isosceles Triangle Puzzler	Isosceles (Geometry)	Computer	Activity	[1]
Test your knowledge on isosceles triangles by answering these questions. Then submit your answers and see what you know. More: lessons, discussions, ratings, reviews,...
Proof as Systematization: Tria...	Triangles (Geometry)	Sketchpad	Activity	[1]
Students use Sketchpad to develop a proof for a result that was discovered and used (without proof) in an earlier activity. The link to the activity itself is to a zip file that contains both the a... More: lessons, discussions, ratings, reviews,...
Impossible Triangles	Triangles (Geometry)	Computer	Activity	[1]
Figure out what makes each of the given triangles impossible. Which triangle property is violated? More: lessons, discussions, ratings, reviews,...
Folding Tape	Triangles (Geometry)	Java Applet	Tool	[1]
This applet demonstrates a problem that tests your knowledge of the properties of different types of triangles. Can you recognize what type of triangle is created? More: lessons, discussions, ratings, reviews,...
Mid-Point Theorem	Triangles (Geometry)	Java Applet	Tool	[1]
Students investigate what is so special about the midpoints of a triangle. They discover the midpoint theorem and can answer an exploration question. More: lessons, discussions, ratings, reviews,...
Area of a Triangle	Triangles (Geometry)	Flash	Tool	[1]
Flash-based introduction to finding the area of a triangle, given the base and height. College Cram charges access fees by the month or by the semester for most resources. To get a preview of thei... More: lessons, discussions, ratings, reviews,...
Interior Angle Theorem	Triangles (Geometry)	Cabri Jr.	Activity	[0]
This activity is designed to help students discover the Interior Angle Theorem: The sum of the measures of the interior angles of a triangle is 180�. More: lessons, discussions, ratings, reviews,...
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