Locus of a point which is equidistant from two concentric circles is the circle concentric with the given circles and midway between them.
Describe the locus for questions 1 to 13 given below:
the locus of points inside a circle and equidistant from two fixed points on the circumference of the circle.
The locus of a point which is equidistant from two concentric circles is the ___ concentric with the given circles.