User:PANAGIOTIS STEFANIDES/sandbox

http://www.stefanides.gr/pdf/2012_Oct/PHOTO_12.pdf For any circle, if a chord , such as (DH) is a quarter of the circles circumference, then the square , such as (DKLM) has an area equal to that of the circle, and perimeter of square (DHRS) equal to the circumference of the circle.

http://www.stefanides.gr/Html/QuadCirc.html

RULER AND COMPASS:http://www.stefanides.gr/Html/piquad.html