Volumes by Cross-Section: Selectable Base, Parallel to y-axis
This applet illustrates the concept of integrating cross-sectional area to produce volumes.
Various possible cross-sections are shown to the left. Select any one you'd like.
f = top function
g = bottom function
n = number of equal intervals into which the interval [a, b] is divided.
Note: Cross sections are drawn parallel to the y-axis.