The degree measure of the angle ABC is 80 °. Beams BD and BE drawn from the vertex b form the angles ABD = 40 °

The degree measure of the angle ABC is 80 °. Beams BD and BE drawn from the vertex b form the angles ABD = 40 °. Which of the rays BD or BE is the axis of symmetry of the angle ABC

By the condition of the problem, beams BD and BE were drawn from vertex B of angle ABC. The resulting angle ABD = 40 °, and the degree measure of the angle ABC is 80 °. This means that the angle ABD is half the angle ABC and, relative to the BD beam, all points lying on the BA beam and the BC beam are equidistant. Therefore, according to the definition of the axis of symmetry, the beam BD will be the axis of symmetry of the angle ABC.
Answer. Beam BD.