Reply To: Polygon area

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Nader Belal

@Harry Alex,

The Shoelace formula is easier to implement.

@Jože Marinko

Note: For calculating area of close non-self intersection polygon, the vertices must go anti-clock wise, and for negative areas (holes) you must go clock wise.

@Harru Alex,

Can you implement Bolyai–Gerwien hypothesis in GDL ?