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Formulas for Quilters

(C)2002 Karen Combs Studio

www.karencombs.com

1.  Square:  Add ½” to the height and length of the finished size.

 

     height     

 

length

2.  Half-square Triangle:  Add 7/8” to the height and length of the finished size of the square made from sewing two half-square triangles together.  Cut square in half, diagonally to create two half-square triangles.

 

     height      

 

                                length

 

 

  1. Quarter-square Triangle:  Add 1 ¼” to the finished size of the longest side of the quarter-square triangle.

 

                  

 

                             Longest Side

 

  1. To figure the finished diagonal measurement of a block, multiply the finished size by 1.41.

 

5.  Multiply the finished length of a diamond patch by 3.41 to find the finished block size for an 8 pointed star.

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