1. The problem statement, all variables and given/known data http://i241.photobucket.com/albums/ff4/alg5045/p13-17.gif The four masses shown in the figure below are connected by massless, rigid rods. (a) Find the coordinates of the center of mass if MA = 130 g and MB = MC = MD = 260 g. (b) Find the moment of inertia about an axis that passes through mass A and is perpendicular to the page. 2. Relevant equations I=mA(rA^2)+mB(rB^2)....... 3. The attempt at a solution I got part A as being .057 m for both x and y. now wouldnt i use: (.130*0)+(.260*.05^2)+(.260*.0707^2)+(.260*.05^2) ?? Its telling me my answer is wrong?!