My favorite way to make flying geese is to cut rectangles the size of the finished flying geese piece and 2 squares equal to the width of the rectangle. Place a square at each end of the rectangle and sew across the diagonal of the square. Trim to a 1/4 in. seam allowance and press as usual. I'm more accurate this way than cutting a bunch of triangles and don't feel I waste that much fabric. If you piece the block on the diagonal you can use a square in the middle and larger triangles on the sides instead of two.