Let M(x, y)be the midpoint of the segment
.
\
Let R and S be the
.
The midpoint of the segment = 
From figure; coordinates of R and S are
respectively.
Substitute the coordinate values
in the
midpoint formula.
\ 
(Product of two different signs is negative)
(Add:
)
(Divide:
)
\
The midpoint point of the segment
is
.