Respuesta :
It is given : P is a point on the perpendicular bisector, l, of MN.
We have to prove PM = PN.
The given statements have a missing Point.A Reflection is a transformation in which the figure is the mirror image of the other. Every point is a mirror reflection of itself .By the definition of reflection, point P is the image of itself ,point N is the image of _M .The line l acts as a Line of symmetry or axis of reflection.
Reflections preserve length so PM = PN.