a ray whose endpoint is the vertex of the angle and which divides the angle into two congruent angles
A line that divides an angle into two equal parts.
A ray that divides an angle into two congruent angles.
A ray that has an endpoint on the vertex of an angle and that divides the angle into two angles of equal measure (Lesson 2.3).
A segment, line, ray, or plane which divides an angle into two con- gruent angles.