The cross product of p
returns a new vector orthogonal to both p
that the cross product is a vector.
cross-product obeys the right
your right hand, point your fingers in the direction of p
curl your fingers towards q
thumb will point in the direction of the cross-product
positive rotation about the p
will rotate p
normal should be along the z-axis because the triangle lies in
Cross product - geometric interpretation
magnitude of the cross product is the area of the parallelogram spanned by the
gives a really easy way to compute a triangle’s area, using vectors along the
triangle’s perimeter is the sum of its edge lengths.