The half square triangle unit is probably the most commonly used patch in a quilt block -- well it is second only to the square. It is made simply with two triangles, filling up half the square each -- hence the name. Take a quick look through this website, or in any quilting magazine, and you will start to notice that this half square triangle, regardless of its size, is present in more quilts than not.
Free Quilt Block Pattern
The Dutch Puzzle quilt block is an easy four patch block, made entirely of half square triangles. There are two sizes of triangles used to make this block.
Due to the directional nature of the quilt block, by using groups of four blocks, rotating them by 90 degrees, you can construct a variety of looks with this one simple quilt block.
Let your imagination soar and see what unique setting you can come up with.