1. Use Midpoint and Distance Formulas
1.3 Geometry

2. Definition of Midpoint
The midpoint of a segment is the point that divides the segment into two congruent segments.
Midpoint formula
If C is the midpoint of segment AB,
then AB = CB.

3. Midpoint Formula
The midpoint of line segment AB written is

4. Segment bisector
A segment bisector is any point, line, line segment, ray, or plane that intersects a line segment to create two smaller line segments that have equal length.
is a ray that cuts
into two congruent segments
and
Therefore,
is a segment bisector.

5. Distance Formula
The distance between two points A(xA,yA) and B(xB,yB) is

6. Using the midpoint and distance formulas
Given R(1,-3) and S(4,2) find midpoint of
Find RS