Suppose you are given a circle. Give a construction to find its centre.
Steps of Construction:
(1) Take three points A, B and C on the given circle.
(2) Join AB and BC.
(3) Draw the perpendicular bisectors of chord AB and BC which intersect each other at O.
(4) Point O will be the required centre of the circle because we know that the perpendicular bisector of the chord always passes through the centre.