Learn how to make half square triangles in this easy to follow tutorial. 1/4 square and 1/2 square triangles are the basis for many quilt block designs and creating them quickly and accurately can help make a myriad of classic quilt designs such as:  Flying Geese, evening star, royal star, hourglass, diagonal, chevron, basket, pinwheel, and many more. Create quick half square triangles and quarter square triangles with our triangle gauge and learn how to trim them with our trimmers!