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Tool: Planar Graphs
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Go to: http://www.flashandmath.com/.../graph3.html (opens a new window)
Description: This set of problems is similar to the ones on pages 1 and 2, but this time, instead of looking for a particular structure within the graph, the question is whether or not the vertices (nodes) of the graph can be rearranged on the plane so that the edges of the graph do not cross. The user demonstrates an answer of "yes" by actually doing it with a drag-and-drop interface. As before, a negative answer is signaled by giving up.
Technology Type: Flash 
Author: Barbara Kaskosz
Language: English 
Cost: Does not require payment for use

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