C is the centre of a circle and AB is the diameter; the co-ordinates of A and C are (6, –7) and (5, –2). Let us calculate the co-ordinates of B.

A point which divides the line segment joining two point s (2, –5) and (–3, –2) externally in the ratio 4: 3. The ordinate of point is

If the point s P(1, 2), Q(4, 6), R(5, 7) and S(x, y) are the vertices of a parallelogram PQRS, then

The point s P and Q lie on 1^st and 3^rd quadrant respectively. The distances of the two points from x – axis and y – axis are 6 units and 4 units respectively. Let us write the co-ordinates of mid-point of line segment PQ.

The point s A and B lie on 2^nd and 4^th quadrant respectively and distance of each point from x – axis and y – axis are 8 units and 6 units respectively. Let us write the co – ordinate of mid-point of line segment AB.