Triangulations 2.0 CD-Rom takes half-square and quarter-square triangle construction to a whole new level. Half square triangle foundations in sizes 1/2" to 7-1/2" in 1/8" increments! Quarter-square sizes 3/4" to 7-1/2" in 1/8" increments! Formatted to fit standard 8-1/2" x 11" computer paper. Four bonus Triangulations patterns. Runs on any PC or Mac computer with Adobe Acrobat Reader.