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Tool: Congruence Theorems
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Description: In this investigation, the user can explore the conditions that guarantee uniqueness of a triangle, quadrilateral, or pentagon regardless of location or orientation. Each set of conditions results in a new congruence theorem.
Technology Type: Java Applet 
Guide: User's Guide (opens a new window)
Author: NCTM: Illuminations
Language: English 
Cost: Does not require payment for use

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Courses: Math 7 Similarity
Geometry Congruence

Comment:This applet is confusing to use... instructions not clear, and graphics very "jumpy."