1. The problem statement, all variables and given/known data A thin uniform wire is bent into a rectangle. The short, vertical sides are of length a, and the long, horizontal sides are of length b. If the total mass is 31.00 grams, a = 25.00 cm and b = 44.30 cm, what is the moment of rotational inertia about an axis through one of the vertical wires? 2. Relevant equations I = 1/3mL^2 3. The attempt at a solution I tried using the above equation, which is the moment of inertia for a solid rectangle. I knew it wasn't going to be right but I don't have an equation for a hollow rectangle. I tried modifying it by using 1/4 or 1/6 because I think the moment of inertia would be smaller for a hollow rectangle than a solid one.