A Spiral Polygon

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Construction1.cdy
Plane Sweep on the Polygon

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Construction3.cdy
Decomposition of the Polygon into Trapezoids

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Construction4.cdy
Decomposition of the Polygon into Monotone Pieces
This is accomplished by adding cusp-to-cusp diagonals...

Please enable Java for an interactive construction (with Cinderella).

Created with Cinderella