(v) Construct the bisector BX of ∠ABC.
hence,
this bisector of an angle is the locus of the centre of a circle having different radii.
now,
any point on BX is equidistant from BA and BC which are the arms of ∠ABC.
(vi) a circle with O as centre is given with a point A on it.
now,
The locus of the centre of a circle which touches the circle at fixed point A on it is the line joining the points O and A.