1. The problem statement, all variables and given/known data Evaluate [tex]\int[/tex][tex]\int[/tex]T (x^2+y^2) dA, where T is the triangle with the vertices (0,0)(1,0)(1,1) 2. Relevant equations 3. The attempt at a solution [tex]\int[/tex] d[tex]\theta[/tex] [tex]\int[/tex] r^3 dr Thats how far I got, not really sure about boundries on r. First integrals boundrie should be 0 to pi/4. Is polar coordinates a good idea? Should I try some other change of variabel? Help is appreciated thanks!