Let $WXYZ$ be a trapezoid with bases $\overline{XY}$ and $\overline{WZ}$. In this trapezoid, $\angle ZXW = 90^\circ$, $\angle XWZ = 60^\circ$, and $\angle XYZ = 120^\circ$. Find $\angle XZW$, in degrees.
X Y
90
W60 30 Z
Triangle ZXW is a 30 - 60 -90 right triangle
Angle XZW = 30°
+1768 
