Triangulations™ 4.0 takes half-square and quarter-square triangle construction to a whole new level. Imagine the freedom of having any size triangle foundation in your hands at the touch of a button. Runs on PC or MAC computer with Adobe Reader ®. Strip Half Square in 1/4" increments. Half Square in 1/16" increments. Quarter Square in 1/8" increments. And Tamed Geese in 1/4" increments.