Parallel Axis Theorem: I = I_cm + $Md^{2}$ CM axis (I_cm) New axis (I) d CM I (new axis) = I_cm + $Md^{2}$ Valid for ANY body | d = distance between parallel axes

Reading the diagram: The CM axis (terracotta dashed line) gives minimum $I_{cm}$. Any parallel axis displaced by $d$ gives $I = I_{cm} + Md^2 > I_{cm}$. The distance $d$ is measured between the two parallel axes (not from the edge of the body).