The bearing of M from N is 250° and the bearing of R from M is 160°. If M is equidistant from N and R. Find the bearing of R and N.
if you draw triangle MNR, you have an isosceles triangle, with
M=90°, making angles N and R 45°
Now finish it off.
M=90°, making angles N and R 45°
Now finish it off.