In mathematics, the signed area or oriented area of a region of an affine plane is its area with orientation specified by the positive or negative sign, that is "plus" ( + {\displaystyle +} ) or "minus" ( − {\displaystyle -} ). More generally, the signed area of an arbitrary surface region is its surface area with specified orientation.
In mathematics, the signed area or oriented area of a region of an affine plane is its area with orientation specified by the positive or negative sign, that is "plus" ( + {\displaystyle +} ) or "minus" ( − {\displaystyle -} ). More generally, the signed area of an arbitrary surface region is its surface area with specified orientation.
Source: Wikipedia "Signed area" · CC BY-SA 4.0
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