1. The problem statement, all variables and given/known data Find the center of mass of the triangle with vertices at (0,0), (6,6) and (-6,6) if the density at (x,y) is equal to y. 2. Relevant equations 3. The attempt at a solution I am having trouble with these centroid/center of mass problems, and I can't even figure out the bounds for sure. Any help/tips?