Triangles are among the most versatile geometric shapes for quiltmaking, whether they are right-angle, equilateral, isosceles, or have irregular angles and sides. Changes in the direction of the blocks in the strips keep the eye flying over the surface. Annie Bendolph often worked with triangles, as in her “Wild Goose Chase” from around 1930, and she was masterful in altering sizes, colors, and directions to create an op-art mood in her “Thousand Pyramids.”