[b]This applet illustrates solids formed by "prism stacking". [/b] [br][br]Various possible cross-sections are shown to the left. Select any one you'd like. [br][br]f = greater (upper) function[br]g = lesser (lower) function[br]n = number of equal intervals into which the interval [a, b] is divided. [br][br]Note: Cross sections are drawn parallel to the y-axis. [br][br]Enjoy!