Date: May 7, 2013 4:48 PM
Author: CCSSIMath
Subject: Re: Based on the quadrilateral tree

It's odd how the identical conversation about trapezoids is taking place simultaneously over in the nyshsmath forum, like in a parallel universe, but ne'er the twain shall meet.

Original post:
http://mathforum.org/kb/message.jspa?messageID=8910815

And our response there (among many):
http://mathforum.org/kb/message.jspa?messageID=8911185