1. The problem statement, all variables and given/known data A regular square pyramid (base length a, height b) is spun about its axis of symmetry z. Calculate its moment of inertia about the z axis 2. Relevant equations volume of pyramid centre of mass 3. The attempt at a solution have found volume and centre of mass. I know the answer to the moment of inertia but when i try to get to it im always out by factors.