If co-ordinates of diameter of a circle are `(-6,3)` and `(6,9)` then co-ordinates of centre is.
`a) (8,-8)`
`b) (12,6)`
`c) (0,6)`
`d) (0,3)`.

The co-ordinates of the end points of a diameter of a circle are (3, -2) and (-3, 6). Find the co-ordinates of the centre and radius.

The co-ordinates of the end points of a diameter of a circle are (0,0) and (4,4). The equation of the circle is :

The co-ordinates of the end points of a diameter are (-1, 5) and (3, -1). Find the co-ordinates of the centre and the radius of circle.

The vertices of DeltaABC are A(0,6) , B(8,12) and C(8,0) . The cordinates of the incentre are:

If the coordinates of one end of a diameter of a circle are (2,\ 3) and the coordinates of its centre are (-2,\ 5) , then the coordinates of the other end of the diameter are (a) (-6,\ 7) (b) (6,\ -7) (c) (6,\ 7) (d) (-6,\ -7)

The co-ordinates of the end points of the latus rectum of a parabola are (3,6) and (-5,6). The co-ordinates of its focus are :

The co-ordinates of three vertices of a parallelogram ABCD are A(1,0) , B(3,4) and C(1,2) . The co-ordinates of fourth vertex D are :

he co-ordinates of the centroid of a triangle PQR are (2, -5). If Q = (-6, 5) and R = (11, 8), calculate the co-ordinates of vertex P.

Three vertices of a parallelogram ABCD are B (6,7) , C (8,3) and D (0,-1) . Find the co-ordinates of vertex A .

The co-ordinates of the vertices of a DeltaABC are A(1, 0) , B(3, 6) and C(3, 2) . Find the length of its medians.