Click on the "Run" button below to see this in action.

This rearranging has created a rectangle whose area is clearly the same as the original parallelogram.
Recall that the
area of a rectangle is found by multiplying its width times its height. The area of the original parallelogram is therefore
where

*w* is the width, or length of a base, and

*h* is the altitude (height) of the parallelogram.

**While you are here..**
... I have a small favor to ask. Over the years we have used advertising to support the site so it can remain free for everyone.
However, advertising revenue is falling and I have always hated the ads. So, would you go to Patreon and become a patron of the site?
*When we reach the goal I will remove all advertising from the site.*

It only takes a minute and any amount would be greatly appreciated.
Thank you for considering it! * – John Page*

Become a patron of the site at patreon.com/mathopenref

(C) 2011 Copyright Math Open Reference. All rights reserved