What is the slope of a line perpendicular to a line with slope 2/3?

Which of the following is NOT a property of a perpendicular bisector?

The perpendicular bisectors of a triangle intersect at a single point called the:

If point P lies on the perpendicular bisector of segment AB, what can be said about the distances PA and PB?

What is the equation of the perpendicular bisector of the line segment joining points (2, 4) and (6, 8)?

Given a line segment with endpoints A and B, how many perpendicular bisectors can it have?

Which geometric construction relies heavily on the concept of a perpendicular bisector?

The coordinates of the midpoint of a line segment are (3, 5). If one endpoint is (1, 2), what is the other endpoint?

A line segment has endpoints (a, b) and (c, d). What is the slope of its perpendicular bisector?

Find the circumcenter of a triangle with vertices (0,0), (4,0), and (0,4).