1.

Find the coordinates of a point A, where AB is the diameter of circle whose center is (2, -3) and B is (1, 4).

Answer»

Let the coordinates of point A be (x, y)

If AB is the diameter, then the center in the mid-point of the diameter

So,

(2, -3) = (x + 1/ 2, y + 4/ 2)

2 = x + 1/2 and -3 = y + 4/ 2

4 = x + 1 and -6 = y + 4

x = 3 and y = -10

Therefore, the coordinates of A are (3, -10)



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