Why Quarter-Square Triangles?
The difference between a Quarter-square triangle and a Half-Square triangle is that in a Quarter-square triangle the long edge (or the hypotenuse) is placed on the straight of grain whereas with the half-square triangle the leg of the triangle is on the straight of grain. Use Quarter-square triangles when the long side of the triangle will be on the block or quilt edge. The straight of grain on the outside edge adds stability.
For this exercise we will be creating a template that allows you to sew multiple 2 finished size Quarter-square triangle units at once.