What is a perpendicular bisector
A line that passes through the midpoint of a side of the
triangle at a right angle.
A ray that bisects an angle into two equal parts.
A line segment joining a vertex of a triangle to the opposite
side of the triangle and forms a right angle.



Answer :

A perpendicular bisector is a line that passes through the midpoint of a side of a triangle at a right angle.

This means it intersects the side of the triangle exactly halfway and forms a 90-degree angle with it. It doesn't necessarily have to go through a vertex of the triangle, and it doesn't bisect an angle.