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
I love the Weathervane quilt block. It can be a great teaching aid for beginner quilters because it uses three different quilt patches -- the square, half square triangle and flying geese units. For quilters who like to play with colour, try introducing more fabrics and you will come up with a totally different looking quilt block.
The two sample quilts illustrate how different you can make your project. By added more blocks and setting on point, or using less quilt blocks and adding additional blank blocks you get two totally different quilts. Blank quilt blocks also give you the opportunity to show off your quilting skills.
Similar block - Quatrefoil