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 All Hallows quilt block is the perfect choice for Halloween and so naturally, I used the obvious colour scheme for this nine patch block. And .. I'm always a sucker for a pinwheel block.
The quilt block features lots of half square triangles and flying geese units -- the first two patches that you learn as a beginner quilter.
Depending on how you lay out the completed blocks, you might see secondary patterns emerging when you place the blocks side by side or separate them with sashing.