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Tool: The Sum of Three Angles of a Triangle
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Description: This applet demonstrates a property of the sum of the three angles of a triangle. In order to get the point, be sure to drag the triangle over so that the left corner of the new triangle touches the tip of the right corner of the original triangle. Something will light up between the two corners (angles) when you have done this correctly.
Technology Type: Java Applet 
Author: International Education Software (IES)
Language: English 
Cost: Does not require payment for use

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Courses: Math 7 Triangles
Geometry Triangles