1. The problem statement, all variables and given/known data In the first photo , i was told that the I represent the moment of inertia about the neutral axis ... But , in the 2nd photo , i found that the author calculate the moment of inertia about the x-axis (parallel to neutral axis ) and y -axis ( perpendicular to neutral axis) ... 2. Relevant equations 3. The attempt at a solution So , is the example in the second photo wrong ?