Question Number 108366 by mathdave last updated on 16/Aug/20
Commented by som(math1967) last updated on 16/Aug/20
$$\angle\mathrm{QRU}=\angle\mathrm{STU}=\mathrm{124}° \\ $$$$\therefore\angle\mathrm{RQU}=\mathrm{180}−\mathrm{124}−\mathrm{31} \\ $$$$\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:=\mathrm{25}° \\ $$