1. The problem statement, all variables and given/known data a) Show that of all the rectangles with a given area, the one with the smallest perimeter is a square. b) Show that of all the rectangles with a given perimeter, the one with the greatest are is a square. 2. Relevant equations As=x2 AR=xy Ps = 4x PR= 2x+2y 3. The attempt at a solution I don't know how to do this any help?