### Home > PC > Chapter 1 > Lesson 1.2.2 > Problem 1-81

1-81.

Find the perpendicular bisector of the segment and

*.*

Find the slope of the line.

Find the midpoint of the line.

Find the slope of the perpendicular line.

Use the point slope form of a line substituting one of the known points and your perpendicular slope.

It is the negative reciprocal of the slope of the line: