Date: Oct 10, 2012 6:56 AM
Author: thomasinventions@yahoo.com
Subject: Re: Two New Approximations, in a Certain Form, for the Perimeter of<br> an Ellipse

You may inspect the formulas presented at:

http://ellipse-circumference.blogspot.com (Blankenhorn-Ramanujan)

and

http://ellipse-circumference3.blogspot.com (Pade variant, under 5E-09 max rel error)