API Reference > geometry-core > CartesianGeometry > Vector3d > isPerpendicularTo isPerpendicularTo Method Test if this vector is perpendicular to other. isPerpendicularTo(other: Vector3d, returnValueIfAnInputIsZeroLength: boolean = false): boolean Parameter Type Description other Vector3d second vector in comparison returnValueIfAnInputIsZeroLength boolean if either vector is near zero length, return this value. Returns - boolean Defined in geometry3d/Point3dVector3d.ts Line 1311 Last Updated: 11 June, 2024