Three right angled triangles are all that is needed to create one of these Flying Geese units (or patches.) The largest triangle piece is considered to be the "geese" piece -- (why it is not called a "goose" piece is beyond me). The other two identical triangles are considered to be the "sky" pieces.
Flying geese units are probably the third most commonly used patches in quiltmaking -- following the square and the half square triangle.
Free Quilt Block Pattern
The Maple Star quilt block was new to me. I was pleasantly surprised at how pretty it turned out. It is an easy nine patch block comprised of simple shapes -- the square, rectangle and triangle. The flying geese unit in the quilt block is the one that composes the star in the title of the pattern.
The two sample quilts shown both use an "on point" setting with sashing. However, the difference is whether additional half quilt blocks were used, as in the example on the right. As you can see, the effect is very different.