What is the length of XY?

Answer: The length of [tex]XY[/tex] is 30.
Step-by-step explanation:
-According to the figure, Δ[tex]XYZ[/tex] is congruent to Δ[tex]XWZ[/tex].
So, if the length of [tex]WX[/tex] is 30, then the length of [tex]XY[/tex] is also 30, because [tex]WX = XY[/tex].