The locus of a point which moves difference of its distance from two fixed straight which are at right angles is equal to the distance from another fixed straight line is

The locus of a point which moves such that difference of its distance from two fixed straight which are at right angles is equal to the distance from another fixed straight line is

The locus of a point which moves such that the sum of its distances from two fixed points is a constant is

The locus of a point which moves such that its distance from a given point is constant is

The locus of a point which moves such that the difference of its distances from two fixed points is always of its distances from two fixed points is always a constant is

The locus of the point which moves such that the ratio of its distance from two fixed point in the plane is always a constant k(< 1) is

The locus of a point which moves so that the difference of the squares of its distance from two given points is constant, is a

The locus of a point which moves so that the difference of the squares of its distance from two given points is constant, is a

The locus of a point which moves so that the difference of the squares of its distance from two given points is constant, is a

The locus of a point which moves so that the difference of the squares of its distance from two given points is constant, is a

The locus of a point which moves so that the difference of the squares of its distances from two given points is constant, is a