To Set The Bevel At An Angle Of , And Of Degrees. In Fig. 40 the board A has a jointed edge a; at any distance from a, gauge a line bc. From any point on bc, with any radius, use the dividers to strike the arc bc; with same radius, strike from b the arc f. Place the beam of the bevel against face a, move blade till it coincides with the points b and f, and the bevel is set at an angle of 60 degrees with one side of beam, and 120 degrees with the other. 60 degrees is the measure of the angle between any two faces of an equilateral triangle, and 120 degrees, of the angle between any two faces of a regular hexagon; for these reasons, the bevel set at these angles is often of use in construction.