1. The problem statement, all variables and given/known data Hi everyone, I need some help to know how to find the components of the inertia tensor matrix of a rigid body formed by a gruop of point masses attached to bars with no mass. I have 3 masses with cartesian coordenates: 1 (a,a,0), 2 (a,0,0) and 3 (-a,-a-0). 3. The attempt at a solution The book says: Ixx= 2ma^2, Ixy= -2ma^2, why?? Thank you!