Find the distance between the origin and (6, 8).

39
Find the ratio in which the points (2, 5) divides the line-segment joining thepoints (-1, 2) and (4, 7).
40
Find the centre of the circle passing through (5, -8), (2, -9) and (2, 1).
42
The centre of a circle is (-6, 4). If the diameter of the circle has its oneend at the origin. Find its other end.
43
Find the ratio in which the x -axis divides the line segment joining the points(3, -2) and (-7, -1).