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Tool: Triangle Classification Game
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Description: 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 grid in order to build the triangle which is required for each challenge. The environment integrates geometry and algebra, prompting many interesting questions. The final challenge asks if it is possible to build an equilateral triangle on a square grid.
Technology Type: Java Applet 
Author: Humberto Josť Bortolossi
Language: English 
Cost: Does not require payment for use

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Courses: Math 4 Triangles
Math 6 Triangles
Math 7 Triangles
Geometry Cartesian plane, Isosceles, Equilateral, Scalene, Right, Obtuse, Acute

Comment:Very very cool. Students construct triangles that are acute, right, obtuse, etc. Open-ended. Immediate feedback. Uses geogebra. Very nice.