Calc AB Helper - using integrals to find volume

Visualizing tool for finding the volume of a shape made by using cross sections perpendicular to the x-axis -

my friend is a high school math teacher and says that her students find this very hard to visualize, so she ends up spending a long time on this subject as well as wastes time and paper creating models. now there's a reusable model for several shapes! these are meant to lay on top of a small paper graph and can be resized to your needs!