Instead of drawing on your fabric, you can also use Easy Piecing Triangle Templates Carefully place the lighter colored strip on top of the darker colored strip with the right sides of the fabic together and the edges in alignment. Cut the strip apart on each of the marked lines. Press the seam allowance to one side. Another common piece used in quilt block construction is the quarter triangle. A quarter triangle is formed by a square cut in half twice on the diagonal.
Many blocks use quarter triangles joined together to form right triangles in their construction.
After cutting the sewn strips apart on the marked lines, each unit must be cut in half again from the corner, to the middle of the longest side. Each marked square will result in four pieced quarter triangle units. There are many different way to speed piece quilt blocks than those described here. The quilter interested in speed piecing techniques should check one of the many books on this technique currently available.