Basic Examples (2) 

Calculate the signed area of a square:

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Calculate the area of a set of points making a simple polygon:

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Show the counterclockwise nature of the original points:

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Rotating the points does not change the signed area:

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Reversing the order of the points reverses the sign of the area:

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Swapping the coordinates also makes the signed area negative:

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Scope (3) 

Find the signed area of a Polygon:

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Find the signed area of a regular polygon:

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Create ten simple random polygons:

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Calculate the signed areas:

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Use the Area function instead. Note the increased time:

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Use SignedArea to find the winding numbers:

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Polygons from RandomPolygon have a positive signed area:

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Run a timing test between SignedArea and Area:

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