API Reference > geometry-core > CartesianGeometry > Vector3d > signedRadiansTo signedRadiansTo Method Return the (simple number of radians, not Strongly typed Angle) angle from this vector to vectorB, measured in the plane containing both, with vectorW indicating which side to view to control sign of the angle. The returned angle can range from negative PI to positive PI (not closed on negative side) The returned angle is "in the plane containing the two vectors" vectorW distinguishes between the sides of the plane, but does not have to be perpendicular. The returned angle has the same sign as vectorW dot product (thisVector cross vectorB) signedRadiansTo(vector1: Vector3d, vectorW: Vector3d): number Parameter Type Description vector1 Vector3d vectorW Vector3d Returns - number Defined in geometry3d/Point3dVector3d.ts Line 1251 Last Updated: 12 June, 2024