1. The problem statement, all variables and given/known data determine the second moment of inertia about the horizontal axis and vertical axis for the shaded area with respect to x and y axes through the centroid of the area . 2. Relevant equations 3. The attempt at a solution Since the x and y axes is drawn thru centroid , why not the y for part 1 = 0mm ? y for part 2 = -30mm?