math
posted by samuel on .
the bearing of Y from X is 160¤ and the bearing of Z from Y is 060¤. find the bearing of X from Z.

The bearing to a point is the angle measured in a clockwise direction from the north line.
In your case,
The bearing of X from Y is 160¤ and the bearing of Z from Y is 060¤.
Z is 220 degrees bearing from X.
X is 220 deg. bearing from Z. That is the same as +140 deg from Z