Tutorial - How to Square Up Half Square Triangles

Perfectly square without using a specialty ruler

Tutorial at Busy Hands Quilts Blog

"Here's a method of squaring or trimming HSTs that doesn't require specialty rulers.  A rotating mat is very helpful but also not required.  You just need a cutting mat, rotary cutter, and a ruler. Note:  This HST is being squared to 9.5" square. Step 1:  Line up the diagonal line of the HST with the diagonal line on the cutting mat.  Place the bottom left corner near an inch line.  Make sure that there will be fabric to cut off of each side, remembering that the left and bottom sides will be cut on an inch line, and the top and right sides will be cut on the half-inch line".... Read more