API Reference > Geometry-core > CartesianGeometry > Geometry > tripleProduct tripleProduct MethodStatic Returns Returns the triple product of 3 vectors provided as x,y,z number sequences. The triple product is the determinant of the 3x3 matrix with the 9 numbers placed in either row or column order. The triple product is positive if the 3 vectors form a right handed coordinate system. The triple product is negative if the 3 vectors form a left handed coordinate system. Treating the 9 numbers as 3 vectors U, V, W, any of these formulas gives the same result: ** U dot (V cross W) ** V dot (W cross U) ** W dot (U cross V) ** (-U dot (W cross V)) -- (note the negative -- reversing cross product order changes the sign) ** (-V dot (U cross W)) -- (note the negative -- reversing cross product order changes the sign) ** (-W dot (V cross U)) -- (note the negative -- reversing cross product order changes the sign) the triple product is 6 times the (signed) volume of the tetrahedron with the three vectors as edges from a common vertex. tripleProduct(ux: number, uy: number, uz: number, vx: number, vy: number, vz: number, wx: number, wy: number, wz: number): number Parameter Type Description ux number uy number uz number vx number vy number vz number wx number wy number wz number Returns - number Defined in Geometry.ts Line 495 Last Updated: 12 June, 2024