The co-ordinate of point B is (4, 1)
Solution:
Given the coordinate of one endpoint of AB and it’s midpoint M , A(0, 9) M(2, 5)
To find: co-ordinate of endpoint B
The midpoint m(x, y) of points
is given as:

Here in this sum,

Substituting in above formula, we get

Compare the L.H.S and R.H.S

Thus the co-ordinate of point B is (4, 1)