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.
Seven Patch Greek Cross
Free Quilt Block Pattern
This Seven Patch Greek Cross quilt block is for those who want a little more detail than the simplified Greek Cross block. Once your basic skills are established you might want to move on to this interesting version.
Seven patch quilt blocks are not as common as others, for the obvious reason that there are many more pieces in the block. However, once you want to challenge yourself a little, try out this verion of the Greek Cross. It is made with the most basic of shapes in quiltmaking -- squares, rectangles and half square triangles, so the only important consideration is careful attention to the precision of your quarter inch seams.
Lots of interesting setting arrangements can be made with this quilt block, and a few are illustrated in the sample quilts shown.
See also ~ Greek Cross