Reference tables contain the angles of right triangles determined by two known legs and by hypotenuse and leg for dimensions from 1 to 200 mm with an interval of 0.5 mm. Angle values are obtained with an accuracy of one second. The tables are intended for markers, locksmiths, fashion designers, boring machines, turners, grinders, OTC workers, technologists, foremen of mechanical workshops and designers of machine-building and other enterprises.