Self-Intersections in a Polygon
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The gray figure is generated by coloring the interior of a sequence of vertices forming a self-intersecting polygon. By moving the handles (black disks) this Demonstration allows you to see the self-intersecting points (red disks) thus generated. You can use Alt+Click to create new handles.
Contributed by: Jaime Rangel-Mondragon (March 2011)
Open content licensed under CC BY-NC-SA
"Self-Intersections in a Polygon"
Wolfram Demonstrations Project
Published: March 7 2011