By partitioning the segment into a ratio of 1:1 means to
equally divide that segment into 2.
We can calculate for the coordinates of point P by taking
the average of the difference of point A and point B.
x axis of point P = (13 + 5) / 2
x axis of point P = 18 / 2
x axis of point P = 9
y axis of point P = (1 + 3) / 2
y axis of point P = 4 / 2
y axis of point P = 2
Therefore the coordinates of point P is (9, 2).
