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3.1 2D Geometry - points and polygons

3.1 2D Geometry - points and polygons. A point in 2D is represented by two real numbers (X,Y). Y. X. A line segment is represented by its two end points (X 1 ,Y 1 ) (X 2 ,Y 2 ), or a 2x2 matrix [ ]. X 1 Y 1 X 2 Y 2. Y. X. A polygon is represented by an list of

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