The distance between two points P,Q is called _______ of PQ
line
In the given figure P is the object and P' is the image. The line AB is which is the perpendicular bisector of PP' is called as ______.
The locus of the point p(x,y) satisfying the relation √(x−3)2+(y−1)2+√(x+3)2+(y−1)2=6 is