P is in the angle AOB. Points m and N are the symmetric points of point P about OA and ob respectively. The perimeter of triangle PEF is 15. Find the length of M and n

P is in the angle AOB. Points m and N are the symmetric points of point P about OA and ob respectively. The perimeter of triangle PEF is 15. Find the length of M and n

Because m and N are symmetric points of point P with respect to OA and ob respectively
So: EP = em, FP = FN
And: EP + FP + EF = 15
So: Mn = EM + EF + FN = EP + EF + FP = 15