# Find the coordina

Let O be the centre of AB.

Since AB is the diameter, so O is the midpoint of AB.

By section formula which states that if a point P (x , y) divides the line with end points A(x1,y1) and B(x2,y2) in the ration m:n, the coordinates of x and y are:

As midpoint divides the line in the ratio 1:1,

Then, the coordinates of A (x, y) can be calculated as:

a + 3 = 2(-2)

a + 3 = -4

a = -7

And,

b + 4 = 2(2)

b + 4 = 4

b = 0

Hence, coordinate of point A is (-7,0).

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