Answer:
S=74 Q=64 R=64
Explanation:
Isosceles triangle's base angles are equivalent. Meaning that angles Q and R are the same. All you have to do after realising that is add all of the angles up and equal them to 180. So (5x+19)+(3x+31)+(3x+31)=180 so 11x+81=180 so 11x=99 so x=11. Plugin 11 for all the points and get your answer. S=74 Q=64 R=64