Triangular coordinates

The term triangular coordinates may refer to any of at least three related systems of coordinates in the Euclidean plane:

• a special case of barycentric coordinates for a triangle, in which case it is known as a ternary plot or areal coordinates, among other names
• Trilinear coordinates, in which the coordinates of a point in a triangle are its relative distances from the three sides
• Synergetics coordinates

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