Help!!! tangent axis Use the parallel-axis theorem to find the moment of inertia of a solid sphere of mass M=3.80kg and radius R=2.30m about an axis that is tangent to the sphere. I am being thrown off this problem because the axis is TANGENT to the sphere and not through the center. According to the equations in my book i thought the equation I would use would be: I= Icm +Mr^2= 3/2 Mr^2 but it didnt work! am i not using the parallel axis right?? Thanks for helping!