Center of Mass of a Rod and
Centroid of a Planar Region

Help Materials Video
The Centroid of a Region; Pappus's Theorem on Volumes video link - centroids

To view the video, you need a high speed internet connection, Version 7 of Apple's QuickTime player installed on your computer (it's free), and we highly recommend that you use the Mozilla Firefox Browser (also free). 

Video Directions: Use a high speed connection to access the video above. Either

Right Click on the links and use Save As to download the video to your computer. Then play it with Version 7 of Apple's QuickTime player.

or

Play the videos directly from this site using the Mozilla Firefox Browser. Of course, you still need Version 7 of Apple's QuickTime Player.