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.
Nine Patch Square
Free Quilt Block Pattern
The Nine Patch Square quilt block is a simple block to construct but can be very dramatic depending on the colour choices made.
Squares, half square triangles and flying geese units are the chosen patches to construct this easy quilt block.
As illustrated in the sample quilt drawings, whether you choose a light or dark fabric for the background can achieve a subtle or vibrant look. It is all in your hands.
Related: Nine Patch Square - Variation