GeoGebra is a wonderful free app for exploring mathematics.
It is available at geogebra.org.
Doug Kuhlmann, who for many years taught mathematics at
Phillips Academy in Andover, Massachusetts,
has developed GeoGebra applets that help visualize in 3D free-response
volume problems from past AP exams.
Doug graciously offered his applets to the mathematics community and let us post them here.
You may download the applets for face-to-face teaching.
You are not authorized to publish or distribute
the applets in any form or post them on the Internet without
Doug Kuhlmann's permission.
* AP and the Advanced Placement Program are
registered trademarks of the
College Entrance Examination Board,
which was not involved in the
production of this web site.