With of length 6.1 cm as diameter draw a circle.
(1) Draw a line segmentof 6.1 cm.
(2) Taking point P as centre and radius more than half of, draw a circle.
(3) With same radius and taking Q as centre, draw arcs to intersect this circle at points R and S.
(4) Join RS which intersects at T.
(5) Taking T as centre and with radius TP, draw a circle which will also pass through Q. It is the required circle.