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Resource Name	Topic (Course)	Technology	Type	Rating
Browsing: All Content in Geometry for Triangles Browse discussions			Login to Subscribe / Save Results
Angles of a Triangle	Triangles (Geometry)	Cabri Jr.	Activity	[0]
Students measure the interior and exterior angles of a triangle and find their relationships. 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,...
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,...
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,...
Traingle area, box method (Coo...	Triangles (Geometry)	Flash	Activity	[0]
An interactive applet and associated web page that calculate the area of a triangle using the box method in coordinate geometry. The applet has a triangle with draggable vertices. As you drag t... More: lessons, discussions, ratings, reviews,...
Triangle area, formula (Coordi...	Triangles (Geometry)	Flash	Activity	[0]
An interactive applet and associated web page that calculate the area of a triangle using the formula method in coordinate geometry. The applet has a triangle with draggable vertices. As you dr... More: lessons, discussions, ratings, reviews,...
Why AAA does not prove congrue...	Triangles (Geometry)	Flash	Activity	[0]
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,...
Why SSA does NOT prove congrue...	Triangles (Geometry)	Flash	Activity	[0]
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,...
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,...
Triangle Geometry	Obtuse (Geometry)+	Java Applet	Activity	[0]
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,...
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,...
A "Possibly New Theorem"	Triangles (Geometry)+	Sketchpad	Activity	[0]
This guided exploration, using Geometer's Sketchpad, leads students to notice what John Conway saw in this triangle construction. More: lessons, discussions, ratings, reviews,...
A Continuation of Minimum Peri...	Triangles (Geometry)+	Sketchpad	Activity	[0]
A further guided exploration of triangles inscribed within triangles, using Geometer's Sketchpad. 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,...
A Minimum Perimeter Inscribed ...	Triangles (Geometry)	Sketchpad	Activity	[0]
A guided exploration about triangle inscribed within triangles, and the conditions under which their perimeter is at a minimum, using Geometer's Sketchpad. More: lessons, discussions, ratings, reviews,...
A New Discovery by Harold Sten...	Triangles (Geometry)	Sketchpad	Activity	[0]
In this guided exploration, students use Geometer's Sketchpad to develop their intuition about triangles and cevians in general, and a proof by Harold Stengel in particular. More: lessons, discussions, ratings, reviews,...
A Triangle Center	Triangles (Geometry)+	Sketchpad	Activity	[0]
In this guided exploration, students use Geometer's Sketchpad to discover a characteristic of one of the special triangle centers. More: lessons, discussions, ratings, reviews,...
Angle Bisectors in a Triangle	Triangles (Geometry)+	Sketchpad	Activity	[0]
A guided exploration of the angle bisectors of a triangle, and the point at which they intersect, using Geometer's Sketchpad. More: lessons, discussions, ratings, reviews,...
Circumscribed Triangles	Triangles (Geometry)	Sketchpad	Activity	[0]
A guided exploration of the relationship between the midpoints of a triangle inscribed in a circle, and the center of the circle, using Geometer's Sketchpad. More: lessons, discussions, ratings, reviews,...
Constellations	Triangles (Geometry)	Sketchpad	Activity	[0]
The task requires students to classify triangles according to angle and side properties. Students use Geometer's Sketchpad to manipulate triangles to see that constructed triangles have imposed... More: lessons, discussions, ratings, reviews,...
Constructions of Equilateral a...	Isosceles (Geometry)+	Sketchpad	Activity	[0]
Students will discuss the difference between drawing and constructing a triangle using The Geometer’s Sketchpad. They will further develop constructions for both isosceles and equilateral triangles. ... More: lessons, discussions, ratings, reviews,...
Exploring Centers of a Triangl...	Centers of triangles (Geometry)	Sketchpad	Activity	[0]
Using problem solving skills, formal geometry, and The Geometer's Sketchpad, students will model and solve two real-world problems by constructing the incenter and circumcenter of triangles. St... More: lessons, discussions, ratings, reviews,...
Exploring Centers of a Triangl...	Centers of triangles (Geometry)	Sketchpad	Activity	[0]
Using problem solving skills, formal geometry, and The Geometer's Sketchpad, students will model and solve a real-world problem by constructing the centroid of a triangle. Students will explore... More: lessons, discussions, ratings, reviews,...
Exploring Characteristics of T...	Triangles (Geometry)	Sketchpad	Activity	[0]
Students draw triangles and explore the classification of each using the measures of interior angles and lengths of sides. In the extension activities, the students further explore and generalize a fo... More: lessons, discussions, ratings, reviews,...
Exploring Types of Triangles	Triangles (Geometry)	Sketchpad	Activity	[0]
Students explore various triangle properties, such as scalene, isosceles, equilateral, acute, right, and obtuse. The link to the tool itself is to a zip file that contains both the activity in pdf ... More: lessons, discussions, ratings, reviews,...
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