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Tool: Euclid's Elements, Book I, Proposition 4 - SAS Triangle Congruence
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Go to: http://aleph0.clarku.edu/~djoyce/java/elements/bookI/propI4.html (opens a new window)
Description: Euclid's proposition deals with the congruence of two triangles if they two sides equal that contain one equal angle respectively then all other angles and sides of the two triangles are equal and they are called congruent (by Side-Angle-Side, SAS). The guide then examines the structure of the proposition. To reset the applet, press "r" while your cursor is over the diagram.
Technology Type: Java Applet 
Guide: User's Guide (opens a new window)
Author: David E. Joyce
Language: English 
Cost: Does not require payment for use

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Courses: Geometry Congruence