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Tuesday, January 4, 2011
Triangle Angle Sum Proof
Move the vertices of the triangle and move sliders P and Q to the extreme right. What do you observe?
This is a Java Applet created using GeoGebra from www.geogebra.org - it looks like you don't have Java installed, please go to
www.java.com
Based on your observations, make a conjecture about the angle sum of a triangle.
There is a tutorial
here
on how to create the applet above.
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