Assertion: polygon's area | /r/AtLocation | negative distance
Facets:
value: from l
type: LOCATION
Source sentences:
text: The area within any closed curve, such as a triangle, is given by the line integral around the curve of the algebraic or signed distance of a point on the curve from an arbitrary oriented straight line L. Points to the right of L as oriented are taken to be at negative distance from L, while the weight for the integral is taken to be the component of arc length parallel to L rather than arc length itself.