Week 3 Day 2, 48th minute's QC Triangle Problem

Problem stated, S
/
/
R -----T
x=z
<SRT= x, <RST=z, <STR=y degree

A B
RT RS
How do you which side <x or <y or <z represent, is it the opposite of <x side equals ST, mean <x = ST or something else?

Hey, can you reformat the post? Or maybe upload a screenshot of the question or a pic from your worksheet?