Find out the median of ABC triangle, which starts from vertex A, where A(1,2), B(2,3),C(2,-5).
Let's choose A1 as being the middle of the opposite side of A vertex, BC.
The coordinates of A1 are:
In order to write the equation of the line AA1, we have to know also the slope mAA1=(yA1-yA)/(xA1-xA)
The equation of the line which passes through the points AA1 and is the median of the side BC: