Trilinear coordinates

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coördinates of a point in a plane, consisting of the three ratios which the three distances of the point from three fixed lines have one to another.

See also: Coordinate

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
Given a triangle ABC, the trilinear coordinates of a point P, with respect to triangle ABC, are an ordered triple of numbers, each of which is proportional to the directed distance from P to one of the side lines.
If point P has trilinear coordinates [alpha] : [beta] : [gamma], then the Cartesian coordinates of P are calculated as follows:
Let N have the trilinear coordinates [alpha] : [beta] : [gamma].
Using (9) and (12), we find trilinear coordinates [alpha] : [beta] : [gamma] of Nagel point N of triangle ABC as follows:
LH65 WENZEL trilinear coordinates measuring instrument is used to measure the plant leaf data.