Answer:
mZ is 72°
Step-by-step explanation:
The three points form a right triangle with a 90° angle at Y. Since a triangle has 180°, first subtract 180-90=90°. Next, subtract 90-18=72 because mX=18°. Therefore, mZ is 72°.
What question i cant see it ,is there a picture or something
This will help u.............
Just use proportions for the "corresponding sides" in each

then just solve for "x" and "y" respectively