http://www.atimetosewquilts.com/measurements.htm
http://quiltingpassion.com/triangles.html
http://www.victorianaquiltdesigns.com/VictorianaQuilters/Library/UsefulInfo/Charts/Charts.htm
http://www.hickoryhillquilts.com/fabric-calculator.htm
http://vrya.net/quilt/index.php
http://quilting.about.com/od/straightsewnborders/ss/straightborders.htm

Hope these help!