1. The problem statement, all variables and given/known data A thin, uniform vane of mass M is in the shape of a right triangle, as shown. Find the rotational inertia about a vertical axis through its apex, as shown in the figure. Express your answer in terms of the triangle’s base width b and its mass M. 2. Relevant equations 3. The attempt at a solution The answer in the back is just ##b^2M/2## without the second term.