Moment of inertia of different cross section?

The moment of inertia (I) of a cross section is a measure of its resistance to bending or flexural deformation. It depends on the shape and distribution of the material in the cross section, with common shapes like rectangles, circles, and I-beams having specific formulas to calculate I. For example, for a rectangle, the moment of inertia about its base is given by ( I = \frac{b h^3}{3} ), where ( b ) is the base width and ( h ) is the height. Different cross-sectional shapes will yield different moments of inertia, impacting their strength and stiffness in structural applications.