Have you ever tried to make a half square triangle in a particular finished size, but not been able to remember how big you need to cut the pieces to get that size? Patchwork Math is the answer.

Patchwork Math is an extremely handy guide to the formulas and piecing techniques for dozens of the most common quilting blocks. It includes formulas and techniques for half square triangles, quarter square triangles, Y-Squares, flying geese, and lots more!

Patchwork Math user T.M. says,
"Lynn's easy patchwork math is a must have for anyone wanting to resize block. It has saved me so much work whether I am following a pattern exactly or working on my own designs. Thanks Lynn"