An angle bisector is a line that splits the angle in two congruent parts.
To construct the angle bisector of any angle follow these steps:
1) With the compass setted on the vertex of the angle, draw an arc that intersects both sides of the angle.
2) From each intersecton draw arcs in the middle of the angle.
3) Draw a line from the vertex to the point where the two arcs drawn intersected each other.
This line bisects the angle.
