Cross Product Formula
This formula calculates the cross-product of two 3D vectors. The cross product of two vectors produces a vector that is perpendicular to the plane the input vectors lie on and whose length is equal to the area of the parallelogram formed between the two vectors.
The cross product of two vectors in 2D is calculated by the determinant of the corresponding 2x2 matrix. Geometrically the cross product corresponds to the signed area of the parallelogram formed between the two vectors.