Reproductive system reading May 18, 2010 http://kidshealth.org/teen/sexual_health/girls/female_repro.html http://kidshealth.org/teen/sexual_health/guys/male_repro.html Read more
Re: http://jd2718.wordpress.com/2007/01/10/puzzle-proving-a-quadrilateral-is-a-parallelogram/ May 17, 2010 If you define opposite to mean non-adjacent in a concave quadrilateral, then wouldn't this work? Read more