The area of a polygon in Cartesian space is to be calculated. Each vertex of the polygon is at a coordinate (x,y). A polygon can be divided in half creating 2 sub polygons by adding a line between 2 non-adjacent vertices and the area of the original polygon is the sum of the area of the sub polygons. When a polygon contains 3 sides, it is a triangle for which a formula can be applied to calculate the area given the coordinates of the vertices.

PolygonsArea\MainClass.class
............\MainClass.java
............\Polygons.jar
............\PolygonsArea.class
............\PolygonsArea.java
............\PolygonsArea.jcp
............\PolygonsArea.jcu
............\PolygonsArea.jcw
............\src_polygonsarea.txt
PolygonsArea

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