Calculate Area

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By Points
Computes the area of a polygon with known vertices.
Hinge
Computes the coordinates of a new point on the line of a known polygon edge, and this point is a vertice of the modified polygon of the given area.
Line
Computes the coordinates of two new points on the lines of two known polygon edges and these points form an edge of the modified polygon of the given area that is parallel to the given edge of the known polygon.