Fold the paper through vertex A so that the rays lie on top of each
other.
Step-by-step explanation:
The meaning of bisect is dividing into two. So surely folding the paper through the vertex would help to bisect the angle.
Follow the below steps to know better:
Consider the angle ABC where B is the midpoint.
Keep the compass at angle vertex B and adjust wide setting
Draw the arc across every leg of the angle
Now keep the compass on the point drawn on each leg, and try drawing an arc in the interior of the angle.
Draw a line through the vertex to the point where the arcs cross (use ruler)