1. The problem statement, all variables and given/known data Let [tex]\Omega[/tex] represent a two dimensional material region who density is given by [tex]\rho[/tex](x,y). Establish an integral formula for the moment of inertia of the material region about the line y=x. 2. Relevant equations The moment of inertia about the x axis: [tex]\int[/tex][tex]\int[/tex]x2[tex]\rho[/tex](x,y)dA 3. The attempt at a solution I am attempting to transform the moment of inertia about the x axis to the line x=y, how would I go about doing this? Thanks for any help, Jim.